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/*
* Copyright (C) 2015 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package okhttp3
import java.net.InetAddress
import java.net.MalformedURLException
import java.net.URI
import java.net.URISyntaxException
import java.net.URL
import java.nio.charset.Charset
import java.nio.charset.StandardCharsets.UTF_8
import java.util.ArrayList
import java.util.Collections
import java.util.LinkedHashSet
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
import okhttp3.internal.canParseAsIpAddress
import okhttp3.internal.delimiterOffset
import okhttp3.internal.indexOfFirstNonAsciiWhitespace
import okhttp3.internal.indexOfLastNonAsciiWhitespace
import okhttp3.internal.parseHexDigit
import okhttp3.internal.publicsuffix.PublicSuffixDatabase
import okhttp3.internal.toCanonicalHost
import okio.Buffer
/**
* A uniform resource locator (URL) with a scheme of either `http` or `https`. Use this class to
* compose and decompose Internet addresses. For example, this code will compose and print a URL for
* Google search:
*
* ```
* HttpUrl url = new HttpUrl.Builder()
* .scheme("https")
* .host("www.google.com")
* .addPathSegment("search")
* .addQueryParameter("q", "polar bears")
* .build();
* System.out.println(url);
* ```
*
* which prints:
*
* ```
* https://www.google.com/search?q=polar%20bears
* ```
*
* As another example, this code prints the human-readable query parameters of a Twitter search:
*
* ```
* HttpUrl url = HttpUrl.parse("https://twitter.com/search?q=cute%20%23puppies&f=images");
* for (int i = 0, size = url.querySize(); i < size; i++) {
* System.out.println(url.queryParameterName(i) + ": " + url.queryParameterValue(i));
* }
* ```
*
* which prints:
*
* ```
* q: cute #puppies
* f: images
* ```
*
* In addition to composing URLs from their component parts and decomposing URLs into their
* component parts, this class implements relative URL resolution: what address you'd reach by
* clicking a relative link on a specified page. For example:
*
* ```
* HttpUrl base = HttpUrl.parse("https://www.youtube.com/user/WatchTheDaily/videos");
* HttpUrl link = base.resolve("../../watch?v=cbP2N1BQdYc");
* System.out.println(link);
* ```
*
* which prints:
*
* ```
* https://www.youtube.com/watch?v=cbP2N1BQdYc
* ```
*
* ## What's in a URL?
*
* A URL has several components.
*
* ### Scheme
*
* Sometimes referred to as *protocol*, A URL's scheme describes what mechanism should be used to
* retrieve the resource. Although URLs have many schemes (`mailto`, `file`, `ftp`), this class only
* supports `http` and `https`. Use [java.net.URI][URI] for URLs with arbitrary schemes.
*
* ### Username and Password
*
* Username and password are either present, or the empty string `""` if absent. This class offers
* no mechanism to differentiate empty from absent. Neither of these components are popular in
* practice. Typically HTTP applications use other mechanisms for user identification and
* authentication.
*
* ### Host
*
* The host identifies the webserver that serves the URL's resource. It is either a hostname like
* `square.com` or `localhost`, an IPv4 address like `192.168.0.1`, or an IPv6 address like `::1`.
*
* Usually a webserver is reachable with multiple identifiers: its IP addresses, registered
* domain names, and even `localhost` when connecting from the server itself. Each of a web server's
* names is a distinct URL and they are not interchangeable. For example, even if
* `http://square.github.io/dagger` and `http://google.github.io/dagger` are served by the same IP
* address, the two URLs identify different resources.
*
* ### Port
*
* The port used to connect to the web server. By default this is 80 for HTTP and 443 for HTTPS.
* This class never returns -1 for the port: if no port is explicitly specified in the URL then the
* scheme's default is used.
*
* ### Path
*
* The path identifies a specific resource on the host. Paths have a hierarchical structure like
* "/square/okhttp/issues/1486" and decompose into a list of segments like `["square", "okhttp",
* "issues", "1486"]`.
*
* This class offers methods to compose and decompose paths by segment. It composes each path
* from a list of segments by alternating between "/" and the encoded segment. For example the
* segments `["a", "b"]` build "/a/b" and the segments `["a", "b", ""]` build "/a/b/".
*
* If a path's last segment is the empty string then the path ends with "/". This class always
* builds non-empty paths: if the path is omitted it defaults to "/". The default path's segment
* list is a single empty string: `[""]`.
*
* ### Query
*
* The query is optional: it can be null, empty, or non-empty. For many HTTP URLs the query string
* is subdivided into a collection of name-value parameters. This class offers methods to set the
* query as the single string, or as individual name-value parameters. With name-value parameters
* the values are optional and names may be repeated.
*
* ### Fragment
*
* The fragment is optional: it can be null, empty, or non-empty. Unlike host, port, path, and
* query the fragment is not sent to the webserver: it's private to the client.
*
* ## Encoding
*
* Each component must be encoded before it is embedded in the complete URL. As we saw above, the
* string `cute #puppies` is encoded as `cute%20%23puppies` when used as a query parameter value.
*
* ### Percent encoding
*
* Percent encoding replaces a character (like `\ud83c\udf69`) with its UTF-8 hex bytes (like
* `%F0%9F%8D%A9`). This approach works for whitespace characters, control characters, non-ASCII
* characters, and characters that already have another meaning in a particular context.
*
* Percent encoding is used in every URL component except for the hostname. But the set of
* characters that need to be encoded is different for each component. For example, the path
* component must escape all of its `?` characters, otherwise it could be interpreted as the
* start of the URL's query. But within the query and fragment components, the `?` character
* doesn't delimit anything and doesn't need to be escaped.
*
* ```
* HttpUrl url = HttpUrl.parse("http://who-let-the-dogs.out").newBuilder()
* .addPathSegment("_Who?_")
* .query("_Who?_")
* .fragment("_Who?_")
* .build();
* System.out.println(url);
* ```
*
* This prints:
*
* ```
* http://who-let-the-dogs.out/_Who%3F_?_Who?_#_Who?_
* ```
*
* When parsing URLs that lack percent encoding where it is required, this class will percent encode
* the offending characters.
*
* ### IDNA Mapping and Punycode encoding
*
* Hostnames have different requirements and use a different encoding scheme. It consists of IDNA
* mapping and Punycode encoding.
*
* In order to avoid confusion and discourage phishing attacks, [IDNA Mapping][idna] transforms
* names to avoid confusing characters. This includes basic case folding: transforming shouting
* `SQUARE.COM` into cool and casual `square.com`. It also handles more exotic characters. For
* example, the Unicode trademark sign (™) could be confused for the letters "TM" in
* `http://ho™mail.com`. To mitigate this, the single character (™) maps to the string (tm). There
* is similar policy for all of the 1.1 million Unicode code points. Note that some code points such
* as "\ud83c\udf69" are not mapped and cannot be used in a hostname.
*
* [Punycode](http://ietf.org/rfc/rfc3492.txt) converts a Unicode string to an ASCII string to make
* international domain names work everywhere. For example, "σ" encodes as "xn--4xa". The encoded
* string is not human readable, but can be used with classes like [InetAddress] to establish
* connections.
*
* ## Why another URL model?
*
* Java includes both [java.net.URL][URL] and [java.net.URI][URI]. We offer a new URL
* model to address problems that the others don't.
*
* ### Different URLs should be different
*
* Although they have different content, `java.net.URL` considers the following two URLs
* equal, and the [equals()][Object.equals] method between them returns true:
*
* * http://square.github.io/
*
* * http://google.github.io/
*
* This is because those two hosts share the same IP address. This is an old, bad design decision
* that makes `java.net.URL` unusable for many things. It shouldn't be used as a [Map] key or in a
* [Set]. Doing so is both inefficient because equality may require a DNS lookup, and incorrect
* because unequal URLs may be equal because of how they are hosted.
*
* ### Equal URLs should be equal
*
* These two URLs are semantically identical, but `java.net.URI` disagrees:
*
* * http://host:80/
*
* * http://host
*
* Both the unnecessary port specification (`:80`) and the absent trailing slash (`/`) cause URI to
* bucket the two URLs separately. This harms URI's usefulness in collections. Any application that
* stores information-per-URL will need to either canonicalize manually, or suffer unnecessary
* redundancy for such URLs.
*
* Because they don't attempt canonical form, these classes are surprisingly difficult to use
* securely. Suppose you're building a webservice that checks that incoming paths are prefixed
* "/static/images/" before serving the corresponding assets from the filesystem.
*
* ```
* String attack = "http://example.com/static/images/../../../../../etc/passwd";
* System.out.println(new URL(attack).getPath());
* System.out.println(new URI(attack).getPath());
* System.out.println(HttpUrl.parse(attack).encodedPath());
* ```
*
* By canonicalizing the input paths, they are complicit in directory traversal attacks. Code that
* checks only the path prefix may suffer!
*
* ```
* /static/images/../../../../../etc/passwd
* /static/images/../../../../../etc/passwd
* /etc/passwd
* ```
*
* ### If it works on the web, it should work in your application
*
* The `java.net.URI` class is strict around what URLs it accepts. It rejects URLs like
* `http://example.com/abc|def` because the `|` character is unsupported. This class is more
* forgiving: it will automatically percent-encode the `|'` yielding `http://example.com/abc%7Cdef`.
* This kind behavior is consistent with web browsers. `HttpUrl` prefers consistency with major web
* browsers over consistency with obsolete specifications.
*
* ### Paths and Queries should decompose
*
* Neither of the built-in URL models offer direct access to path segments or query parameters.
* Manually using `StringBuilder` to assemble these components is cumbersome: do '+' characters get
* silently replaced with spaces? If a query parameter contains a '&', does that get escaped?
* By offering methods to read and write individual query parameters directly, application
* developers are saved from the hassles of encoding and decoding.
*
* ### Plus a modern API
*
* The URL (JDK1.0) and URI (Java 1.4) classes predate builders and instead use telescoping
* constructors. For example, there's no API to compose a URI with a custom port without also
* providing a query and fragment.
*
* Instances of [HttpUrl] are well-formed and always have a scheme, host, and path. With
* `java.net.URL` it's possible to create an awkward URL like `http:/` with scheme and path but no
* hostname. Building APIs that consume such malformed values is difficult!
*
* This class has a modern API. It avoids punitive checked exceptions: [toHttpUrl] throws
* [IllegalArgumentException] on invalid input or [toHttpUrlOrNull] returns null if the input is an
* invalid URL. You can even be explicit about whether each component has been encoded already.
*
* [idna]: http://www.unicode.org/reports/tr46/#ToASCII
*/
class HttpUrl internal constructor(
/** Either "http" or "https". */
@get:JvmName("scheme") val scheme: String,
/**
* The decoded username, or an empty string if none is present.
*
* | URL | `username()` |
* | :------------------------------- | :----------- |
* | `http://host/` | `""` |
* | `http://username@host/` | `"username"` |
* | `http://username:password@host/` | `"username"` |
* | `http://a%20b:c%20d@host/` | `"a b"` |
*/
@get:JvmName("username") val username: String,
/**
* Returns the decoded password, or an empty string if none is present.
*
* | URL | `password()` |
* | :------------------------------- | :----------- |
* | `http://host/` | `""` |
* | `http://username@host/` | `""` |
* | `http://username:password@host/` | `"password"` |
* | `http://a%20b:c%20d@host/` | `"c d"` |
*/
@get:JvmName("password") val password: String,
/**
* The host address suitable for use with [InetAddress.getAllByName]. May be:
*
* * A regular host name, like `android.com`.
*
* * An IPv4 address, like `127.0.0.1`.
*
* * An IPv6 address, like `::1`. Note that there are no square braces.
*
* * An encoded IDN, like `xn--n3h.net`.
*
* | URL | `host()` |
* | :-------------------- | :-------------- |
* | `http://android.com/` | `"android.com"` |
* | `http://127.0.0.1/` | `"127.0.0.1"` |
* | `http://[::1]/` | `"::1"` |
* | `http://xn--n3h.net/` | `"xn--n3h.net"` |
*/
@get:JvmName("host") val host: String,
/**
* The explicitly-specified port if one was provided, or the default port for this URL's scheme.
* For example, this returns 8443 for `https://square.com:8443/` and 443 for
* `https://square.com/`. The result is in `[1..65535]`.
*
* | URL | `port()` |
* | :------------------ | :------- |
* | `http://host/` | `80` |
* | `http://host:8000/` | `8000` |
* | `https://host/` | `443` |
*/
@get:JvmName("port") val port: Int,
/**
* A list of path segments like `["a", "b", "c"]` for the URL `http://host/a/b/c`. This list is
* never empty though it may contain a single empty string.
*
* | URL | `pathSegments()` |
* | :----------------------- | :------------------ |
* | `http://host/` | `[""]` |
* | `http://host/a/b/c"` | `["a", "b", "c"]` |
* | `http://host/a/b%20c/d"` | `["a", "b c", "d"]` |
*/
@get:JvmName("pathSegments") val pathSegments: List,
/**
* Alternating, decoded query names and values, or null for no query. Names may be empty or
* non-empty, but never null. Values are null if the name has no corresponding '=' separator, or
* empty, or non-empty.
*/
private val queryNamesAndValues: List?,
/**
* This URL's fragment, like `"abc"` for `http://host/#abc`. This is null if the URL has no
* fragment.
*
* | URL | `fragment()` |
* | :--------------------- | :----------- |
* | `http://host/` | null |
* | `http://host/#` | `""` |
* | `http://host/#abc` | `"abc"` |
* | `http://host/#abc|def` | `"abc|def"` |
*/
@get:JvmName("fragment") val fragment: String?,
/** Canonical URL. */
private val url: String
) {
val isHttps: Boolean = scheme == "https"
/** Returns this URL as a [java.net.URL][URL]. */
@JvmName("url") fun toUrl(): URL {
try {
return URL(url)
} catch (e: MalformedURLException) {
throw RuntimeException(e) // Unexpected!
}
}
/**
* Returns this URL as a [java.net.URI][URI]. Because `URI` is more strict than this class, the
* returned URI may be semantically different from this URL:
*
* * Characters forbidden by URI like `[` and `|` will be escaped.
*
* * Invalid percent-encoded sequences like `%xx` will be encoded like `%25xx`.
*
* * Whitespace and control characters in the fragment will be stripped.
*
* These differences may have a significant consequence when the URI is interpreted by a
* web server. For this reason the [URI class][URI] and this method should be avoided.
*/
@JvmName("uri") fun toUri(): URI {
val uri = newBuilder().reencodeForUri().toString()
return try {
URI(uri)
} catch (e: URISyntaxException) {
// Unlikely edge case: the URI has a forbidden character in the fragment. Strip it & retry.
try {
val stripped = uri.replace(Regex("[\\u0000-\\u001F\\u007F-\\u009F\\p{javaWhitespace}]"), "")
URI.create(stripped)
} catch (e1: Exception) {
throw RuntimeException(e) // Unexpected!
}
}
}
/**
* The username, or an empty string if none is set.
*
* | URL | `encodedUsername()` |
* | :------------------------------- | :------------------ |
* | `http://host/` | `""` |
* | `http://username@host/` | `"username"` |
* | `http://username:password@host/` | `"username"` |
* | `http://a%20b:c%20d@host/` | `"a%20b"` |
*/
@get:JvmName("encodedUsername") val encodedUsername: String
get() {
if (username.isEmpty()) return ""
val usernameStart = scheme.length + 3 // "://".length() == 3.
val usernameEnd = url.delimiterOffset(":@", usernameStart, url.length)
return url.substring(usernameStart, usernameEnd)
}
/**
* The password, or an empty string if none is set.
*
* | URL | `encodedPassword()` |
* | :--------------------------------| :------------------ |
* | `http://host/` | `""` |
* | `http://username@host/` | `""` |
* | `http://username:password@host/` | `"password"` |
* | `http://a%20b:c%20d@host/` | `"c%20d"` |
*/
@get:JvmName("encodedPassword") val encodedPassword: String
get() {
if (password.isEmpty()) return ""
val passwordStart = url.indexOf(':', scheme.length + 3) + 1
val passwordEnd = url.indexOf('@')
return url.substring(passwordStart, passwordEnd)
}
/**
* The number of segments in this URL's path. This is also the number of slashes in this URL's
* path, like 3 in `http://host/a/b/c`. This is always at least 1.
*
* | URL | `pathSize()` |
* | :------------------- | :----------- |
* | `http://host/` | `1` |
* | `http://host/a/b/c` | `3` |
* | `http://host/a/b/c/` | `4` |
*/
@get:JvmName("pathSize") val pathSize: Int get() = pathSegments.size
/**
* The entire path of this URL encoded for use in HTTP resource resolution. The returned path will
* start with `"/"`.
*
* | URL | `encodedPath()` |
* | :---------------------- | :-------------- |
* | `http://host/` | `"/"` |
* | `http://host/a/b/c` | `"/a/b/c"` |
* | `http://host/a/b%20c/d` | `"/a/b%20c/d"` |
*/
@get:JvmName("encodedPath") val encodedPath: String
get() {
val pathStart = url.indexOf('/', scheme.length + 3) // "://".length() == 3.
val pathEnd = url.delimiterOffset("?#", pathStart, url.length)
return url.substring(pathStart, pathEnd)
}
/**
* A list of encoded path segments like `["a", "b", "c"]` for the URL `http://host/a/b/c`. This
* list is never empty though it may contain a single empty string.
*
* | URL | `encodedPathSegments()` |
* | :---------------------- | :---------------------- |
* | `http://host/` | `[""]` |
* | `http://host/a/b/c` | `["a", "b", "c"]` |
* | `http://host/a/b%20c/d` | `["a", "b%20c", "d"]` |
*/
@get:JvmName("encodedPathSegments") val encodedPathSegments: List
get() {
val pathStart = url.indexOf('/', scheme.length + 3)
val pathEnd = url.delimiterOffset("?#", pathStart, url.length)
val result = mutableListOf()
var i = pathStart
while (i < pathEnd) {
i++ // Skip the '/'.
val segmentEnd = url.delimiterOffset('/', i, pathEnd)
result.add(url.substring(i, segmentEnd))
i = segmentEnd
}
return result
}
/**
* The query of this URL, encoded for use in HTTP resource resolution. This string may be null
* (for URLs with no query), empty (for URLs with an empty query) or non-empty (all other URLs).
*
* | URL | `encodedQuery()` |
* | :-------------------------------- | :--------------------- |
* | `http://host/` | null |
* | `http://host/?` | `""` |
* | `http://host/?a=apple&k=key+lime` | `"a=apple&k=key+lime"` |
* | `http://host/?a=apple&a=apricot` | `"a=apple&a=apricot"` |
* | `http://host/?a=apple&b` | `"a=apple&b"` |
*/
@get:JvmName("encodedQuery") val encodedQuery: String?
get() {
if (queryNamesAndValues == null) return null // No query.
val queryStart = url.indexOf('?') + 1
val queryEnd = url.delimiterOffset('#', queryStart, url.length)
return url.substring(queryStart, queryEnd)
}
/**
* This URL's query, like `"abc"` for `http://host/?abc`. Most callers should prefer
* [queryParameterName] and [queryParameterValue] because these methods offer direct access to
* individual query parameters.
*
* | URL | `query()` |
* | :-------------------------------- | :--------------------- |
* | `http://host/` | null |
* | `http://host/?` | `""` |
* | `http://host/?a=apple&k=key+lime` | `"a=apple&k=key lime"` |
* | `http://host/?a=apple&a=apricot` | `"a=apple&a=apricot"` |
* | `http://host/?a=apple&b` | `"a=apple&b"` |
*/
@get:JvmName("query") val query: String?
get() {
if (queryNamesAndValues == null) return null // No query.
val result = StringBuilder()
queryNamesAndValues.toQueryString(result)
return result.toString()
}
/**
* The number of query parameters in this URL, like 2 for `http://host/?a=apple&b=banana`. If this
* URL has no query this is 0. Otherwise it is one more than the number of `"&"` separators in the
* query.
*
* | URL | `querySize()` |
* | :-------------------------------- | :------------ |
* | `http://host/` | `0` |
* | `http://host/?` | `1` |
* | `http://host/?a=apple&k=key+lime` | `2` |
* | `http://host/?a=apple&a=apricot` | `2` |
* | `http://host/?a=apple&b` | `2` |
*/
@get:JvmName("querySize") val querySize: Int
get() {
return if (queryNamesAndValues != null) queryNamesAndValues.size / 2 else 0
}
/**
* The first query parameter named `name` decoded using UTF-8, or null if there is no such query
* parameter.
*
* | URL | `queryParameter("a")` |
* | :-------------------------------- | :-------------------- |
* | `http://host/` | null |
* | `http://host/?` | null |
* | `http://host/?a=apple&k=key+lime` | `"apple"` |
* | `http://host/?a=apple&a=apricot` | `"apple"` |
* | `http://host/?a=apple&b` | `"apple"` |
*/
fun queryParameter(name: String): String? {
if (queryNamesAndValues == null) return null
for (i in 0 until queryNamesAndValues.size step 2) {
if (name == queryNamesAndValues[i]) {
return queryNamesAndValues[i + 1]
}
}
return null
}
/**
* The distinct query parameter names in this URL, like `["a", "b"]` for
* `http://host/?a=apple&b=banana`. If this URL has no query this is the empty set.
*
* | URL | `queryParameterNames()` |
* | :-------------------------------- | :---------------------- |
* | `http://host/` | `[]` |
* | `http://host/?` | `[""]` |
* | `http://host/?a=apple&k=key+lime` | `["a", "k"]` |
* | `http://host/?a=apple&a=apricot` | `["a"]` |
* | `http://host/?a=apple&b` | `["a", "b"]` |
*/
@get:JvmName("queryParameterNames") val queryParameterNames: Set
get() {
if (queryNamesAndValues == null) return emptySet()
val result = LinkedHashSet()
for (i in 0 until queryNamesAndValues.size step 2) {
result.add(queryNamesAndValues[i]!!)
}
return Collections.unmodifiableSet(result)
}
/**
* Returns all values for the query parameter `name` ordered by their appearance in this
* URL. For example this returns `["banana"]` for `queryParameterValue("b")` on
* `http://host/?a=apple&b=banana`.
*
* | URL | `queryParameterValues("a")` | `queryParameterValues("b")` |
* | :-------------------------------- | :-------------------------- | :-------------------------- |
* | `http://host/` | `[]` | `[]` |
* | `http://host/?` | `[]` | `[]` |
* | `http://host/?a=apple&k=key+lime` | `["apple"]` | `[]` |
* | `http://host/?a=apple&a=apricot` | `["apple", "apricot"]` | `[]` |
* | `http://host/?a=apple&b` | `["apple"]` | `[null]` |
*/
fun queryParameterValues(name: String): List {
if (queryNamesAndValues == null) return emptyList()
val result = mutableListOf()
for (i in 0 until queryNamesAndValues.size step 2) {
if (name == queryNamesAndValues[i]) {
result.add(queryNamesAndValues[i + 1])
}
}
return Collections.unmodifiableList(result)
}
/**
* Returns the name of the query parameter at `index`. For example this returns `"a"`
* for `queryParameterName(0)` on `http://host/?a=apple&b=banana`. This throws if
* `index` is not less than the [query size][querySize].
*
* | URL | `queryParameterName(0)` | `queryParameterName(1)` |
* | :-------------------------------- | :---------------------- | :---------------------- |
* | `http://host/` | exception | exception |
* | `http://host/?` | `""` | exception |
* | `http://host/?a=apple&k=key+lime` | `"a"` | `"k"` |
* | `http://host/?a=apple&a=apricot` | `"a"` | `"a"` |
* | `http://host/?a=apple&b` | `"a"` | `"b"` |
*/
fun queryParameterName(index: Int): String {
if (queryNamesAndValues == null) throw IndexOutOfBoundsException()
return queryNamesAndValues[index * 2]!!
}
/**
* Returns the value of the query parameter at `index`. For example this returns `"apple"` for
* `queryParameterName(0)` on `http://host/?a=apple&b=banana`. This throws if `index` is not less
* than the [query size][querySize].
*
* | URL | `queryParameterValue(0)` | `queryParameterValue(1)` |
* | :-------------------------------- | :----------------------- | :----------------------- |
* | `http://host/` | exception | exception |
* | `http://host/?` | null | exception |
* | `http://host/?a=apple&k=key+lime` | `"apple"` | `"key lime"` |
* | `http://host/?a=apple&a=apricot` | `"apple"` | `"apricot"` |
* | `http://host/?a=apple&b` | `"apple"` | null |
*/
fun queryParameterValue(index: Int): String? {
if (queryNamesAndValues == null) throw IndexOutOfBoundsException()
return queryNamesAndValues[index * 2 + 1]
}
/**
* This URL's encoded fragment, like `"abc"` for `http://host/#abc`. This is null if the URL has
* no fragment.
*
* | URL | `encodedFragment()` |
* | :--------------------- | :------------------ |
* | `http://host/` | null |
* | `http://host/#` | `""` |
* | `http://host/#abc` | `"abc"` |
* | `http://host/#abc|def` | `"abc|def"` |
*/
@get:JvmName("encodedFragment") val encodedFragment: String?
get() {
if (fragment == null) return null
val fragmentStart = url.indexOf('#') + 1
return url.substring(fragmentStart)
}
/**
* Returns a string with containing this URL with its username, password, query, and fragment
* stripped, and its path replaced with `/...`. For example, redacting
* `http://username:[email protected]/path` returns `http://example.com/...`.
*/
fun redact(): String {
return newBuilder("/...")!!
.username("")
.password("")
.build()
.toString()
}
/**
* Returns the URL that would be retrieved by following `link` from this URL, or null if the
* resulting URL is not well-formed.
*/
fun resolve(link: String): HttpUrl? = newBuilder(link)?.build()
/**
* Returns a builder based on this URL.
*/
fun newBuilder(): Builder {
val result = Builder()
result.scheme = scheme
result.encodedUsername = encodedUsername
result.encodedPassword = encodedPassword
result.host = host
// If we're set to a default port, unset it in case of a scheme change.
result.port = if (port != defaultPort(scheme)) port else -1
result.encodedPathSegments.clear()
result.encodedPathSegments.addAll(encodedPathSegments)
result.encodedQuery(encodedQuery)
result.encodedFragment = encodedFragment
return result
}
/**
* Returns a builder for the URL that would be retrieved by following `link` from this URL,
* or null if the resulting URL is not well-formed.
*/
fun newBuilder(link: String): Builder? {
return try {
Builder().parse(this, link)
} catch (_: IllegalArgumentException) {
null
}
}
override fun equals(other: Any?): Boolean {
return other is HttpUrl && other.url == url
}
override fun hashCode(): Int = url.hashCode()
override fun toString(): String = url
/**
* Returns the domain name of this URL's [host] that is one level beneath the public suffix by
* consulting the [public suffix list](https://publicsuffix.org). Returns null if this URL's
* [host] is an IP address or is considered a public suffix by the public suffix list.
*
* In general this method **should not** be used to test whether a domain is valid or routable.
* Instead, DNS is the recommended source for that information.
*
* | URL | `topPrivateDomain()` |
* | :---------------------------- | :------------------- |
* | `http://google.com` | `"google.com"` |
* | `http://adwords.google.co.uk` | `"google.co.uk"` |
* | `http://square` | null |
* | `http://co.uk` | null |
* | `http://localhost` | null |
* | `http://127.0.0.1` | null |
*/
fun topPrivateDomain(): String? {
return if (host.canParseAsIpAddress()) {
null
} else {
PublicSuffixDatabase.get().getEffectiveTldPlusOne(host)
}
}
@JvmName("-deprecated_url")
@Deprecated(
message = "moved to toUrl()",
replaceWith = ReplaceWith(expression = "toUrl()"),
level = DeprecationLevel.ERROR)
fun url() = toUrl()
@JvmName("-deprecated_uri")
@Deprecated(
message = "moved to toUri()",
replaceWith = ReplaceWith(expression = "toUri()"),
level = DeprecationLevel.ERROR)
fun uri() = toUri()
@JvmName("-deprecated_scheme")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "scheme"),
level = DeprecationLevel.ERROR)
fun scheme(): String = scheme
@JvmName("-deprecated_encodedUsername")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "encodedUsername"),
level = DeprecationLevel.ERROR)
fun encodedUsername(): String = encodedUsername
@JvmName("-deprecated_username")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "username"),
level = DeprecationLevel.ERROR)
fun username(): String = username
@JvmName("-deprecated_encodedPassword")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "encodedPassword"),
level = DeprecationLevel.ERROR)
fun encodedPassword(): String = encodedPassword
@JvmName("-deprecated_password")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "password"),
level = DeprecationLevel.ERROR)
fun password(): String = password
@JvmName("-deprecated_host")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "host"),
level = DeprecationLevel.ERROR)
fun host(): String = host
@JvmName("-deprecated_port")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "port"),
level = DeprecationLevel.ERROR)
fun port(): Int = port
@JvmName("-deprecated_pathSize")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "pathSize"),
level = DeprecationLevel.ERROR)
fun pathSize(): Int = pathSize
@JvmName("-deprecated_encodedPath")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "encodedPath"),
level = DeprecationLevel.ERROR)
fun encodedPath(): String = encodedPath
@JvmName("-deprecated_encodedPathSegments")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "encodedPathSegments"),
level = DeprecationLevel.ERROR)
fun encodedPathSegments(): List = encodedPathSegments
@JvmName("-deprecated_pathSegments")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "pathSegments"),
level = DeprecationLevel.ERROR)
fun pathSegments(): List = pathSegments
@JvmName("-deprecated_encodedQuery")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "encodedQuery"),
level = DeprecationLevel.ERROR)
fun encodedQuery(): String? = encodedQuery
@JvmName("-deprecated_query")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "query"),
level = DeprecationLevel.ERROR)
fun query(): String? = query
@JvmName("-deprecated_querySize")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "querySize"),
level = DeprecationLevel.ERROR)
fun querySize(): Int = querySize
@JvmName("-deprecated_queryParameterNames")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "queryParameterNames"),
level = DeprecationLevel.ERROR)
fun queryParameterNames(): Set = queryParameterNames
@JvmName("-deprecated_encodedFragment")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "encodedFragment"),
level = DeprecationLevel.ERROR)
fun encodedFragment(): String? = encodedFragment
@JvmName("-deprecated_fragment")
@Deprecated(
message = "moved to val",
replaceWith = ReplaceWith(expression = "fragment"),
level = DeprecationLevel.ERROR)
fun fragment(): String? = fragment
class Builder {
internal var scheme: String? = null
internal var encodedUsername = ""
internal var encodedPassword = ""
internal var host: String? = null
internal var port = -1
internal val encodedPathSegments = mutableListOf()
internal var encodedQueryNamesAndValues: MutableList? = null
internal var encodedFragment: String? = null
init {
encodedPathSegments.add("") // The default path is '/' which needs a trailing space.
}
/**
* @param scheme either "http" or "https".
*/
fun scheme(scheme: String) = apply {
when {
scheme.equals("http", ignoreCase = true) -> this.scheme = "http"
scheme.equals("https", ignoreCase = true) -> this.scheme = "https"
else -> throw IllegalArgumentException("unexpected scheme: $scheme")
}
}
fun username(username: String) = apply {
this.encodedUsername = username.canonicalize(encodeSet = USERNAME_ENCODE_SET)
}
fun encodedUsername(encodedUsername: String) = apply {
this.encodedUsername = encodedUsername.canonicalize(
encodeSet = USERNAME_ENCODE_SET,
alreadyEncoded = true
)
}
fun password(password: String) = apply {
this.encodedPassword = password.canonicalize(encodeSet = PASSWORD_ENCODE_SET)
}
fun encodedPassword(encodedPassword: String) = apply {
this.encodedPassword = encodedPassword.canonicalize(
encodeSet = PASSWORD_ENCODE_SET,
alreadyEncoded = true
)
}
/**
* @param host either a regular hostname, International Domain Name, IPv4 address, or IPv6
* address.
*/
fun host(host: String) = apply {
val encoded = host.percentDecode().toCanonicalHost() ?: throw IllegalArgumentException(
"unexpected host: $host")
this.host = encoded
}
fun port(port: Int) = apply {
require(port in 1..65535) { "unexpected port: $port" }
this.port = port
}
private fun effectivePort(): Int {
return if (port != -1) port else defaultPort(scheme!!)
}
fun addPathSegment(pathSegment: String) = apply {
push(pathSegment, 0, pathSegment.length, addTrailingSlash = false, alreadyEncoded = false)
}
/**
* Adds a set of path segments separated by a slash (either `\` or `/`). If `pathSegments`
* starts with a slash, the resulting URL will have empty path segment.
*/
fun addPathSegments(pathSegments: String): Builder = addPathSegments(pathSegments, false)
fun addEncodedPathSegment(encodedPathSegment: String) = apply {
push(encodedPathSegment, 0, encodedPathSegment.length, addTrailingSlash = false,
alreadyEncoded = true)
}
/**
* Adds a set of encoded path segments separated by a slash (either `\` or `/`). If
* `encodedPathSegments` starts with a slash, the resulting URL will have empty path segment.
*/
fun addEncodedPathSegments(encodedPathSegments: String): Builder =
addPathSegments(encodedPathSegments, true)
private fun addPathSegments(pathSegments: String, alreadyEncoded: Boolean) = apply {
var offset = 0
do {
val segmentEnd = pathSegments.delimiterOffset("/\\", offset, pathSegments.length)
val addTrailingSlash = segmentEnd < pathSegments.length
push(pathSegments, offset, segmentEnd, addTrailingSlash, alreadyEncoded)
offset = segmentEnd + 1
} while (offset <= pathSegments.length)
}
fun setPathSegment(index: Int, pathSegment: String) = apply {
val canonicalPathSegment = pathSegment.canonicalize(encodeSet = PATH_SEGMENT_ENCODE_SET)
require(!isDot(canonicalPathSegment) && !isDotDot(canonicalPathSegment)) {
"unexpected path segment: $pathSegment"
}
encodedPathSegments[index] = canonicalPathSegment
}
fun setEncodedPathSegment(index: Int, encodedPathSegment: String) = apply {
val canonicalPathSegment = encodedPathSegment.canonicalize(
encodeSet = PATH_SEGMENT_ENCODE_SET,
alreadyEncoded = true
)
encodedPathSegments[index] = canonicalPathSegment
require(!isDot(canonicalPathSegment) && !isDotDot(canonicalPathSegment)) {
"unexpected path segment: $encodedPathSegment"
}
}
fun removePathSegment(index: Int) = apply {
encodedPathSegments.removeAt(index)
if (encodedPathSegments.isEmpty()) {
encodedPathSegments.add("") // Always leave at least one '/'.
}
}
fun encodedPath(encodedPath: String) = apply {
require(encodedPath.startsWith("/")) { "unexpected encodedPath: $encodedPath" }
resolvePath(encodedPath, 0, encodedPath.length)
}
fun query(query: String?) = apply {
this.encodedQueryNamesAndValues = query?.canonicalize(
encodeSet = QUERY_ENCODE_SET,
plusIsSpace = true
)?.toQueryNamesAndValues()
}
fun encodedQuery(encodedQuery: String?) = apply {
this.encodedQueryNamesAndValues = encodedQuery?.canonicalize(
encodeSet = QUERY_ENCODE_SET,
alreadyEncoded = true,
plusIsSpace = true
)?.toQueryNamesAndValues()
}
/** Encodes the query parameter using UTF-8 and adds it to this URL's query string. */
fun addQueryParameter(name: String, value: String?) = apply {
if (encodedQueryNamesAndValues == null) encodedQueryNamesAndValues = mutableListOf()
encodedQueryNamesAndValues!!.add(name.canonicalize(
encodeSet = QUERY_COMPONENT_ENCODE_SET,
plusIsSpace = true
))
encodedQueryNamesAndValues!!.add(value?.canonicalize(
encodeSet = QUERY_COMPONENT_ENCODE_SET,
plusIsSpace = true
))
}
/** Adds the pre-encoded query parameter to this URL's query string. */
fun addEncodedQueryParameter(encodedName: String, encodedValue: String?) = apply {
if (encodedQueryNamesAndValues == null) encodedQueryNamesAndValues = mutableListOf()
encodedQueryNamesAndValues!!.add(encodedName.canonicalize(
encodeSet = QUERY_COMPONENT_REENCODE_SET,
alreadyEncoded = true,
plusIsSpace = true
))
encodedQueryNamesAndValues!!.add(encodedValue?.canonicalize(
encodeSet = QUERY_COMPONENT_REENCODE_SET,
alreadyEncoded = true,
plusIsSpace = true
))
}
fun setQueryParameter(name: String, value: String?) = apply {
removeAllQueryParameters(name)
addQueryParameter(name, value)
}
fun setEncodedQueryParameter(encodedName: String, encodedValue: String?) = apply {
removeAllEncodedQueryParameters(encodedName)
addEncodedQueryParameter(encodedName, encodedValue)
}
fun removeAllQueryParameters(name: String) = apply {
if (encodedQueryNamesAndValues == null) return this
val nameToRemove = name.canonicalize(
encodeSet = QUERY_COMPONENT_ENCODE_SET,
plusIsSpace = true
)
removeAllCanonicalQueryParameters(nameToRemove)
}
fun removeAllEncodedQueryParameters(encodedName: String) = apply {
if (encodedQueryNamesAndValues == null) return this
removeAllCanonicalQueryParameters(encodedName.canonicalize(
encodeSet = QUERY_COMPONENT_REENCODE_SET,
alreadyEncoded = true,
plusIsSpace = true
))
}
private fun removeAllCanonicalQueryParameters(canonicalName: String) {
for (i in encodedQueryNamesAndValues!!.size - 2 downTo 0 step 2) {
if (canonicalName == encodedQueryNamesAndValues!![i]) {
encodedQueryNamesAndValues!!.removeAt(i + 1)
encodedQueryNamesAndValues!!.removeAt(i)
if (encodedQueryNamesAndValues!!.isEmpty()) {
encodedQueryNamesAndValues = null
return
}
}
}
}
fun fragment(fragment: String?) = apply {
this.encodedFragment = fragment?.canonicalize(
encodeSet = FRAGMENT_ENCODE_SET,
unicodeAllowed = true
)
}
fun encodedFragment(encodedFragment: String?) = apply {
this.encodedFragment = encodedFragment?.canonicalize(
encodeSet = FRAGMENT_ENCODE_SET,
alreadyEncoded = true,
unicodeAllowed = true
)
}
/**
* Re-encodes the components of this URL so that it satisfies (obsolete) RFC 2396, which is
* particularly strict for certain components.
*/
internal fun reencodeForUri() = apply {
host = host?.replace(Regex("[\"<>^`{|}]"), "")
for (i in 0 until encodedPathSegments.size) {
encodedPathSegments[i] = encodedPathSegments[i].canonicalize(
encodeSet = PATH_SEGMENT_ENCODE_SET_URI,
alreadyEncoded = true,
strict = true
)
}
val encodedQueryNamesAndValues = this.encodedQueryNamesAndValues
if (encodedQueryNamesAndValues != null) {
for (i in 0 until encodedQueryNamesAndValues.size) {
encodedQueryNamesAndValues[i] = encodedQueryNamesAndValues[i]?.canonicalize(
encodeSet = QUERY_COMPONENT_ENCODE_SET_URI,
alreadyEncoded = true,
strict = true,
plusIsSpace = true
)
}
}
encodedFragment = encodedFragment?.canonicalize(
encodeSet = FRAGMENT_ENCODE_SET_URI,
alreadyEncoded = true,
strict = true,
unicodeAllowed = true
)
}
fun build(): HttpUrl {
@Suppress("UNCHECKED_CAST") // percentDecode returns either List or List.
return HttpUrl(
scheme = scheme ?: throw IllegalStateException("scheme == null"),
username = encodedUsername.percentDecode(),
password = encodedPassword.percentDecode(),
host = host ?: throw IllegalStateException("host == null"),
port = effectivePort(),
pathSegments = encodedPathSegments.percentDecode() as List,
queryNamesAndValues = encodedQueryNamesAndValues?.percentDecode(plusIsSpace = true),
fragment = encodedFragment?.percentDecode(),
url = toString()
)
}
override fun toString(): String {
return buildString {
if (scheme != null) {
append(scheme)
append("://")
} else {
append("//")
}
if (encodedUsername.isNotEmpty() || encodedPassword.isNotEmpty()) {
append(encodedUsername)
if (encodedPassword.isNotEmpty()) {
append(':')
append(encodedPassword)
}
append('@')
}
if (host != null) {
if (':' in host!!) {
// Host is an IPv6 address.
append('[')
append(host)
append(']')
} else {
append(host)
}
}
if (port != -1 || scheme != null) {
val effectivePort = effectivePort()
if (scheme == null || effectivePort != defaultPort(scheme!!)) {
append(':')
append(effectivePort)
}
}
encodedPathSegments.toPathString(this)
if (encodedQueryNamesAndValues != null) {
append('?')
encodedQueryNamesAndValues!!.toQueryString(this)
}
if (encodedFragment != null) {
append('#')
append(encodedFragment)
}
}
}
internal fun parse(base: HttpUrl?, input: String): Builder {
var pos = input.indexOfFirstNonAsciiWhitespace()
val limit = input.indexOfLastNonAsciiWhitespace(pos)
// Scheme.
val schemeDelimiterOffset = schemeDelimiterOffset(input, pos, limit)
if (schemeDelimiterOffset != -1) {
when {
input.startsWith("https:", ignoreCase = true, startIndex = pos) -> {
this.scheme = "https"
pos += "https:".length
}
input.startsWith("http:", ignoreCase = true, startIndex = pos) -> {
this.scheme = "http"
pos += "http:".length
}
else -> throw IllegalArgumentException("Expected URL scheme 'http' or 'https' but was '" +
input.substring(0, schemeDelimiterOffset) + "'")
}
} else if (base != null) {
this.scheme = base.scheme
} else {
throw IllegalArgumentException(
"Expected URL scheme 'http' or 'https' but no colon was found")
}
// Authority.
var hasUsername = false
var hasPassword = false
val slashCount = input.slashCount(pos, limit)
if (slashCount >= 2 || base == null || base.scheme != this.scheme) {
// Read an authority if either:
// * The input starts with 2 or more slashes. These follow the scheme if it exists.
// * The input scheme exists and is different from the base URL's scheme.
//
// The structure of an authority is:
// username:password@host:port
//
// Username, password and port are optional.
// [username[:password]@]host[:port]
pos += slashCount
authority@ while (true) {
val componentDelimiterOffset = input.delimiterOffset("@/\\?#", pos, limit)
val c = if (componentDelimiterOffset != limit) {
input[componentDelimiterOffset].toInt()
} else {
-1
}
when (c) {
'@'.toInt() -> {
// User info precedes.
if (!hasPassword) {
val passwordColonOffset = input.delimiterOffset(':', pos, componentDelimiterOffset)
val canonicalUsername = input.canonicalize(
pos = pos,
limit = passwordColonOffset,
encodeSet = USERNAME_ENCODE_SET,
alreadyEncoded = true
)
this.encodedUsername = if (hasUsername) {
this.encodedUsername + "%40" + canonicalUsername
} else {
canonicalUsername
}
if (passwordColonOffset != componentDelimiterOffset) {
hasPassword = true
this.encodedPassword = input.canonicalize(
pos = passwordColonOffset + 1,
limit = componentDelimiterOffset,
encodeSet = PASSWORD_ENCODE_SET,
alreadyEncoded = true
)
}
hasUsername = true
} else {
this.encodedPassword = this.encodedPassword + "%40" + input.canonicalize(
pos = pos,
limit = componentDelimiterOffset,
encodeSet = PASSWORD_ENCODE_SET,
alreadyEncoded = true
)
}
pos = componentDelimiterOffset + 1
}
-1, '/'.toInt(), '\\'.toInt(), '?'.toInt(), '#'.toInt() -> {
// Host info precedes.
val portColonOffset = portColonOffset(input, pos, componentDelimiterOffset)
if (portColonOffset + 1 < componentDelimiterOffset) {
host = input.percentDecode(pos = pos, limit = portColonOffset).toCanonicalHost()
port = parsePort(input, portColonOffset + 1, componentDelimiterOffset)
require(port != -1) {
"Invalid URL port: \"${input.substring(portColonOffset + 1,
componentDelimiterOffset)}\""
}
} else {
host = input.percentDecode(pos = pos, limit = portColonOffset).toCanonicalHost()
port = defaultPort(scheme!!)
}
require(host != null) {
"$INVALID_HOST: \"${input.substring(pos, portColonOffset)}\""
}
pos = componentDelimiterOffset
break@authority
}
}
}
} else {
// This is a relative link. Copy over all authority components. Also maybe the path & query.
this.encodedUsername = base.encodedUsername
this.encodedPassword = base.encodedPassword
this.host = base.host
this.port = base.port
this.encodedPathSegments.clear()
this.encodedPathSegments.addAll(base.encodedPathSegments)
if (pos == limit || input[pos] == '#') {
encodedQuery(base.encodedQuery)
}
}
// Resolve the relative path.
val pathDelimiterOffset = input.delimiterOffset("?#", pos, limit)
resolvePath(input, pos, pathDelimiterOffset)
pos = pathDelimiterOffset
// Query.
if (pos < limit && input[pos] == '?') {
val queryDelimiterOffset = input.delimiterOffset('#', pos, limit)
this.encodedQueryNamesAndValues = input.canonicalize(
pos = pos + 1,
limit = queryDelimiterOffset,
encodeSet = QUERY_ENCODE_SET,
alreadyEncoded = true,
plusIsSpace = true
).toQueryNamesAndValues()
pos = queryDelimiterOffset
}
// Fragment.
if (pos < limit && input[pos] == '#') {
this.encodedFragment = input.canonicalize(
pos = pos + 1,
limit = limit,
encodeSet = FRAGMENT_ENCODE_SET,
alreadyEncoded = true,
unicodeAllowed = true
)
}
return this
}
private fun resolvePath(input: String, startPos: Int, limit: Int) {
var pos = startPos
// Read a delimiter.
if (pos == limit) {
// Empty path: keep the base path as-is.
return
}
val c = input[pos]
if (c == '/' || c == '\\') {
// Absolute path: reset to the default "/".
encodedPathSegments.clear()
encodedPathSegments.add("")
pos++
} else {
// Relative path: clear everything after the last '/'.
encodedPathSegments[encodedPathSegments.size - 1] = ""
}
// Read path segments.
var i = pos
while (i < limit) {
val pathSegmentDelimiterOffset = input.delimiterOffset("/\\", i, limit)
val segmentHasTrailingSlash = pathSegmentDelimiterOffset < limit
push(input, i, pathSegmentDelimiterOffset, segmentHasTrailingSlash, true)
i = pathSegmentDelimiterOffset
if (segmentHasTrailingSlash) i++
}
}
/** Adds a path segment. If the input is ".." or equivalent, this pops a path segment. */
private fun push(
input: String,
pos: Int,
limit: Int,
addTrailingSlash: Boolean,
alreadyEncoded: Boolean
) {
val segment = input.canonicalize(
pos = pos,
limit = limit,
encodeSet = PATH_SEGMENT_ENCODE_SET,
alreadyEncoded = alreadyEncoded
)
if (isDot(segment)) {
return // Skip '.' path segments.
}
if (isDotDot(segment)) {
pop()
return
}
if (encodedPathSegments[encodedPathSegments.size - 1].isEmpty()) {
encodedPathSegments[encodedPathSegments.size - 1] = segment
} else {
encodedPathSegments.add(segment)
}
if (addTrailingSlash) {
encodedPathSegments.add("")
}
}
private fun isDot(input: String): Boolean {
return input == "." || input.equals("%2e", ignoreCase = true)
}
private fun isDotDot(input: String): Boolean {
return input == ".." ||
input.equals("%2e.", ignoreCase = true) ||
input.equals(".%2e", ignoreCase = true) ||
input.equals("%2e%2e", ignoreCase = true)
}
/**
* Removes a path segment. When this method returns the last segment is always "", which means
* the encoded path will have a trailing '/'.
*
* Popping "/a/b/c/" yields "/a/b/". In this case the list of path segments goes from ["a",
* "b", "c", ""] to ["a", "b", ""].
*
* Popping "/a/b/c" also yields "/a/b/". The list of path segments goes from ["a", "b", "c"]
* to ["a", "b", ""].
*/
private fun pop() {
val removed = encodedPathSegments.removeAt(encodedPathSegments.size - 1)
// Make sure the path ends with a '/' by either adding an empty string or clearing a segment.
if (removed.isEmpty() && encodedPathSegments.isNotEmpty()) {
encodedPathSegments[encodedPathSegments.size - 1] = ""
} else {
encodedPathSegments.add("")
}
}
companion object {
internal const val INVALID_HOST = "Invalid URL host"
/**
* Returns the index of the ':' in `input` that is after scheme characters. Returns -1 if
* `input` does not have a scheme that starts at `pos`.
*/
private fun schemeDelimiterOffset(input: String, pos: Int, limit: Int): Int {
if (limit - pos < 2) return -1
val c0 = input[pos]
if ((c0 < 'a' || c0 > 'z') && (c0 < 'A' || c0 > 'Z')) return -1 // Not a scheme start char.
characters@ for (i in pos + 1 until limit) {
return when (input[i]) {
// Scheme character. Keep going.
in 'a'..'z', in 'A'..'Z', in '0'..'9', '+', '-', '.' -> continue@characters
// Scheme prefix!
':' -> i
// Non-scheme character before the first ':'.
else -> -1
}
}
return -1 // No ':'; doesn't start with a scheme.
}
/** Returns the number of '/' and '\' slashes in this, starting at `pos`. */
private fun String.slashCount(pos: Int, limit: Int): Int {
var slashCount = 0
for (i in pos until limit) {
val c = this[i]
if (c == '\\' || c == '/') {
slashCount++
} else {
break
}
}
return slashCount
}
/** Finds the first ':' in `input`, skipping characters between square braces "[...]". */
private fun portColonOffset(input: String, pos: Int, limit: Int): Int {
var i = pos
while (i < limit) {
when (input[i]) {
'[' -> {
while (++i < limit) {
if (input[i] == ']') break
}
}
':' -> return i
}
i++
}
return limit // No colon.
}
private fun parsePort(input: String, pos: Int, limit: Int): Int {
return try {
// Canonicalize the port string to skip '\n' etc.
val portString = input.canonicalize(pos = pos, limit = limit, encodeSet = "")
val i = portString.toInt()
if (i in 1..65535) i else -1
} catch (_: NumberFormatException) {
-1 // Invalid port.
}
}
}
}
companion object {
private val HEX_DIGITS =
charArrayOf('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F')
internal const val USERNAME_ENCODE_SET = " \"':;<=>@[]^`{}|/\\?#"
internal const val PASSWORD_ENCODE_SET = " \"':;<=>@[]^`{}|/\\?#"
internal const val PATH_SEGMENT_ENCODE_SET = " \"<>^`{}|/\\?#"
internal const val PATH_SEGMENT_ENCODE_SET_URI = "[]"
internal const val QUERY_ENCODE_SET = " \"'<>#"
internal const val QUERY_COMPONENT_REENCODE_SET = " \"'<>#&="
internal const val QUERY_COMPONENT_ENCODE_SET = " !\"#$&'(),/:;<=>?@[]\\^`{|}~"
internal const val QUERY_COMPONENT_ENCODE_SET_URI = "\\^`{|}"
internal const val FORM_ENCODE_SET = " \"':;<=>@[]^`{}|/\\?#&!$(),~"
internal const val FRAGMENT_ENCODE_SET = ""
internal const val FRAGMENT_ENCODE_SET_URI = " \"#<>\\^`{|}"
/** Returns 80 if `scheme.equals("http")`, 443 if `scheme.equals("https")` and -1 otherwise. */
@JvmStatic
fun defaultPort(scheme: String): Int {
return when (scheme) {
"http" -> 80
"https" -> 443
else -> -1
}
}
/** Returns a path string for this list of path segments. */
internal fun List.toPathString(out: StringBuilder) {
for (i in 0 until size) {
out.append('/')
out.append(this[i])
}
}
/** Returns a string for this list of query names and values. */
internal fun List.toQueryString(out: StringBuilder) {
for (i in 0 until size step 2) {
val name = this[i]
val value = this[i + 1]
if (i > 0) out.append('&')
out.append(name)
if (value != null) {
out.append('=')
out.append(value)
}
}
}
/**
* Cuts this string up into alternating parameter names and values. This divides a query string
* like `subject=math&easy&problem=5-2=3` into the list `["subject", "math", "easy", null,
* "problem", "5-2=3"]`. Note that values may be null and may contain '=' characters.
*/
internal fun String.toQueryNamesAndValues(): MutableList {
val result = mutableListOf()
var pos = 0
while (pos <= length) {
var ampersandOffset = indexOf('&', pos)
if (ampersandOffset == -1) ampersandOffset = length
val equalsOffset = indexOf('=', pos)
if (equalsOffset == -1 || equalsOffset > ampersandOffset) {
result.add(substring(pos, ampersandOffset))
result.add(null) // No value for this name.
} else {
result.add(substring(pos, equalsOffset))
result.add(substring(equalsOffset + 1, ampersandOffset))
}
pos = ampersandOffset + 1
}
return result
}
/**
* Returns a new [HttpUrl] representing this.
*
* @throws IllegalArgumentException If this is not a well-formed HTTP or HTTPS URL.
*/
@JvmStatic
@JvmName("get") fun String.toHttpUrl(): HttpUrl = Builder().parse(null, this).build()
/**
* Returns a new `HttpUrl` representing `url` if it is a well-formed HTTP or HTTPS URL, or null
* if it isn't.
*/
@JvmStatic
@JvmName("parse") fun String.toHttpUrlOrNull(): HttpUrl? {
return try {
toHttpUrl()
} catch (_: IllegalArgumentException) {
null
}
}
/**
* Returns an [HttpUrl] for this if its protocol is `http` or `https`, or null if it has any
* other protocol.
*/
@JvmStatic
@JvmName("get") fun URL.toHttpUrlOrNull(): HttpUrl? = toString().toHttpUrlOrNull()
@JvmStatic
@JvmName("get") fun URI.toHttpUrlOrNull(): HttpUrl? = toString().toHttpUrlOrNull()
@JvmName("-deprecated_get")
@Deprecated(
message = "moved to extension function",
replaceWith = ReplaceWith(
expression = "url.toHttpUrl()",
imports = ["okhttp3.HttpUrl.Companion.toHttpUrl"]),
level = DeprecationLevel.ERROR)
fun get(url: String): HttpUrl = url.toHttpUrl()
@JvmName("-deprecated_parse")
@Deprecated(
message = "moved to extension function",
replaceWith = ReplaceWith(
expression = "url.toHttpUrlOrNull()",
imports = ["okhttp3.HttpUrl.Companion.toHttpUrlOrNull"]),
level = DeprecationLevel.ERROR)
fun parse(url: String): HttpUrl? = url.toHttpUrlOrNull()
@JvmName("-deprecated_get")
@Deprecated(
message = "moved to extension function",
replaceWith = ReplaceWith(
expression = "url.toHttpUrlOrNull()",
imports = ["okhttp3.HttpUrl.Companion.toHttpUrlOrNull"]),
level = DeprecationLevel.ERROR)
fun get(url: URL): HttpUrl? = url.toHttpUrlOrNull()
@JvmName("-deprecated_get")
@Deprecated(
message = "moved to extension function",
replaceWith = ReplaceWith(
expression = "uri.toHttpUrlOrNull()",
imports = ["okhttp3.HttpUrl.Companion.toHttpUrlOrNull"]),
level = DeprecationLevel.ERROR)
fun get(uri: URI): HttpUrl? = uri.toHttpUrlOrNull()
internal fun String.percentDecode(
pos: Int = 0,
limit: Int = length,
plusIsSpace: Boolean = false
): String {
for (i in pos until limit) {
val c = this[i]
if (c == '%' || c == '+' && plusIsSpace) {
// Slow path: the character at i requires decoding!
val out = Buffer()
out.writeUtf8(this, pos, i)
out.writePercentDecoded(this, pos = i, limit = limit, plusIsSpace = plusIsSpace)
return out.readUtf8()
}
}
// Fast path: no characters in [pos..limit) required decoding.
return substring(pos, limit)
}
private fun Buffer.writePercentDecoded(
encoded: String,
pos: Int,
limit: Int,
plusIsSpace: Boolean
) {
var codePoint: Int
var i = pos
while (i < limit) {
codePoint = encoded.codePointAt(i)
if (codePoint == '%'.toInt() && i + 2 < limit) {
val d1 = encoded[i + 1].parseHexDigit()
val d2 = encoded[i + 2].parseHexDigit()
if (d1 != -1 && d2 != -1) {
writeByte((d1 shl 4) + d2)
i += 2
i += Character.charCount(codePoint)
continue
}
} else if (codePoint == '+'.toInt() && plusIsSpace) {
writeByte(' '.toInt())
i++
continue
}
writeUtf8CodePoint(codePoint)
i += Character.charCount(codePoint)
}
}
private fun List.percentDecode(plusIsSpace: Boolean = false): List {
val size = size
val result = ArrayList(size)
for (i in this) {
result.add(i?.percentDecode(plusIsSpace = plusIsSpace))
}
return Collections.unmodifiableList(result)
}
private fun String.isPercentEncoded(pos: Int, limit: Int): Boolean {
return pos + 2 < limit &&
this[pos] == '%' &&
this[pos + 1].parseHexDigit() != -1 &&
this[pos + 2].parseHexDigit() != -1
}
/**
* Returns a substring of `input` on the range `[pos..limit)` with the following
* transformations:
*
* * Tabs, newlines, form feeds and carriage returns are skipped.
*
* * In queries, ' ' is encoded to '+' and '+' is encoded to "%2B".
*
* * Characters in `encodeSet` are percent-encoded.
*
* * Control characters and non-ASCII characters are percent-encoded.
*
* * All other characters are copied without transformation.
*
* @param alreadyEncoded true to leave '%' as-is; false to convert it to '%25'.
* @param strict true to encode '%' if it is not the prefix of a valid percent encoding.
* @param plusIsSpace true to encode '+' as "%2B" if it is not already encoded.
* @param unicodeAllowed true to leave non-ASCII codepoint unencoded.
* @param charset which charset to use, null equals UTF-8.
*/
internal fun String.canonicalize(
pos: Int = 0,
limit: Int = length,
encodeSet: String,
alreadyEncoded: Boolean = false,
strict: Boolean = false,
plusIsSpace: Boolean = false,
unicodeAllowed: Boolean = false,
charset: Charset? = null
): String {
var codePoint: Int
var i = pos
while (i < limit) {
codePoint = codePointAt(i)
if (codePoint < 0x20 ||
codePoint == 0x7f ||
codePoint >= 0x80 && !unicodeAllowed ||
codePoint.toChar() in encodeSet ||
codePoint == '%'.toInt() &&
(!alreadyEncoded || strict && !isPercentEncoded(i, limit)) ||
codePoint == '+'.toInt() && plusIsSpace) {
// Slow path: the character at i requires encoding!
val out = Buffer()
out.writeUtf8(this, pos, i)
out.writeCanonicalized(
input = this,
pos = i,
limit = limit,
encodeSet = encodeSet,
alreadyEncoded = alreadyEncoded,
strict = strict,
plusIsSpace = plusIsSpace,
unicodeAllowed = unicodeAllowed,
charset = charset
)
return out.readUtf8()
}
i += Character.charCount(codePoint)
}
// Fast path: no characters in [pos..limit) required encoding.
return substring(pos, limit)
}
private fun Buffer.writeCanonicalized(
input: String,
pos: Int,
limit: Int,
encodeSet: String,
alreadyEncoded: Boolean,
strict: Boolean,
plusIsSpace: Boolean,
unicodeAllowed: Boolean,
charset: Charset?
) {
var encodedCharBuffer: Buffer? = null // Lazily allocated.
var codePoint: Int
var i = pos
while (i < limit) {
codePoint = input.codePointAt(i)
if (alreadyEncoded && (codePoint == '\t'.toInt() || codePoint == '\n'.toInt() ||
codePoint == '\u000c'.toInt() || codePoint == '\r'.toInt())) {
// Skip this character.
} else if (codePoint == '+'.toInt() && plusIsSpace) {
// Encode '+' as '%2B' since we permit ' ' to be encoded as either '+' or '%20'.
writeUtf8(if (alreadyEncoded) "+" else "%2B")
} else if (codePoint < 0x20 ||
codePoint == 0x7f ||
codePoint >= 0x80 && !unicodeAllowed ||
codePoint.toChar() in encodeSet ||
codePoint == '%'.toInt() &&
(!alreadyEncoded || strict && !input.isPercentEncoded(i, limit))) {
// Percent encode this character.
if (encodedCharBuffer == null) {
encodedCharBuffer = Buffer()
}
if (charset == null || charset == UTF_8) {
encodedCharBuffer.writeUtf8CodePoint(codePoint)
} else {
encodedCharBuffer.writeString(input, i, i + Character.charCount(codePoint), charset)
}
while (!encodedCharBuffer.exhausted()) {
val b = encodedCharBuffer.readByte().toInt() and 0xff
writeByte('%'.toInt())
writeByte(HEX_DIGITS[b shr 4 and 0xf].toInt())
writeByte(HEX_DIGITS[b and 0xf].toInt())
}
} else {
// This character doesn't need encoding. Just copy it over.
writeUtf8CodePoint(codePoint)
}
i += Character.charCount(codePoint)
}
}
}
}
