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package com.undefinedlabs.scope.deps.okhttp3;
import com.undefinedlabs.scope.deps.okhttp3.internal.publicsuffix.PublicSuffixDatabase;
import com.undefinedlabs.scope.deps.okio.Buffer;
import java.net.*;
import java.util.*;
import static com.undefinedlabs.scope.deps.okhttp3.internal.Util.*;
public final class HttpUrl {
private static final char[] HEX_DIGITS =
{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
static final String USERNAME_ENCODE_SET = " \"':;<=>@[]^`{}|/\\?#";
static final String PASSWORD_ENCODE_SET = " \"':;<=>@[]^`{}|/\\?#";
static final String PATH_SEGMENT_ENCODE_SET = " \"<>^`{}|/\\?#";
static final String PATH_SEGMENT_ENCODE_SET_URI = "[]";
static final String QUERY_ENCODE_SET = " \"'<>#";
static final String QUERY_COMPONENT_ENCODE_SET = " \"'<>#&=";
static final String QUERY_COMPONENT_ENCODE_SET_URI = "\\^`{|}";
static final String FORM_ENCODE_SET = " \"':;<=>@[]^`{}|/\\?#&!$(),~";
static final String FRAGMENT_ENCODE_SET = "";
static final String FRAGMENT_ENCODE_SET_URI = " \"#<>\\^`{|}";
/** Either "http" or "https". */
final String scheme;
/** Decoded username. */
private final String username;
/** Decoded password. */
private final String password;
/** Canonical hostname. */
final String host;
/** Either 80, 443 or a user-specified port. In range [1..65535]. */
final int port;
/**
* A list of canonical path segments. This list always contains at least one element, which may be
* the empty string. Each segment is formatted with a leading '/', so if path segments were ["a",
* "b", ""], then the encoded path would be "/a/b/".
*/
private final List pathSegments;
/**
* 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 final List queryNamesAndValues;
/** Decoded fragment. */
private final String fragment;
/** Canonical URL. */
private final String url;
HttpUrl(Builder builder) {
this.scheme = builder.scheme;
this.username = percentDecode(builder.encodedUsername, false);
this.password = percentDecode(builder.encodedPassword, false);
this.host = builder.host;
this.port = builder.effectivePort();
this.pathSegments = percentDecode(builder.encodedPathSegments, false);
this.queryNamesAndValues = builder.encodedQueryNamesAndValues != null
? percentDecode(builder.encodedQueryNamesAndValues, true)
: null;
this.fragment = builder.encodedFragment != null
? percentDecode(builder.encodedFragment, false)
: null;
this.url = builder.toString();
}
/** Returns this URL as a {@link URL java.net.URL}. */
public URL url() {
try {
return new URL(url);
} catch (MalformedURLException e) {
throw new RuntimeException(e); // Unexpected!
}
}
/**
* Returns this URL as a {@link URI java.net.URI}. Because {@code URI} is more strict than this
* class, the returned URI may be semantically different from this URL:
*
*
*
Characters forbidden by URI like {@code [} and {@code |} will be escaped.
*
Invalid percent-encoded sequences like {@code %xx} will be encoded like {@code %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
* webserver. For this reason the {@linkplain URI URI class} and this method should be avoided.
*/
public URI uri() {
String uri = newBuilder().reencodeForUri().toString();
try {
return new URI(uri);
} catch (URISyntaxException e) {
// Unlikely edge case: the URI has a forbidden character in the fragment. Strip it & retry.
try {
String stripped = uri.replaceAll("[\\u0000-\\u001F\\u007F-\\u009F\\p{javaWhitespace}]", "");
return URI.create(stripped);
} catch (Exception e1) {
throw new RuntimeException(e); // Unexpected!
}
}
}
/** Returns either "http" or "https". */
public String scheme() {
return scheme;
}
public boolean isHttps() {
return scheme.equals("https");
}
/**
* Returns the username, or an empty string if none is set.
*
*
*
URL
{@code encodedUsername()}
*
{@code http://host/}
{@code ""}
*
{@code http://username@host/}
{@code "username"}
*
{@code http://username:password@host/}
{@code "username"}
*
{@code http://a%20b:c%20d@host/}
{@code "a%20b"}
*
*/
public String encodedUsername() {
if (username.isEmpty()) return "";
int usernameStart = scheme.length() + 3; // "://".length() == 3.
int usernameEnd = delimiterOffset(url, usernameStart, url.length(), ":@");
return url.substring(usernameStart, usernameEnd);
}
/**
* Returns the decoded username, or an empty string if none is present.
*
*
*
URL
{@code username()}
*
{@code http://host/}
{@code ""}
*
{@code http://username@host/}
{@code "username"}
*
{@code http://username:password@host/}
{@code "username"}
*
{@code http://a%20b:c%20d@host/}
{@code "a b"}
*
*/
public String username() {
return username;
}
/**
* Returns the password, or an empty string if none is set.
*
*
*
URL
{@code encodedPassword()}
*
{@code http://host/}
{@code ""}
*
{@code http://username@host/}
{@code ""}
*
{@code http://username:password@host/}
{@code "password"}
*
{@code http://a%20b:c%20d@host/}
{@code "c%20d"}
*
*/
public String encodedPassword() {
if (password.isEmpty()) return "";
int passwordStart = url.indexOf(':', scheme.length() + 3) + 1;
int passwordEnd = url.indexOf('@');
return url.substring(passwordStart, passwordEnd);
}
/**
* Returns the decoded password, or an empty string if none is present.
*
*
*
URL
{@code password()}
*
{@code http://host/}
{@code ""}
*
{@code http://username@host/}
{@code ""}
*
{@code http://username:password@host/}
{@code "password"}
*
{@code http://a%20b:c%20d@host/}
{@code "c d"}
*
*/
public String password() {
return password;
}
/**
* Returns the host address suitable for use with {@link InetAddress#getAllByName(String)}. May
* be:
*
*
*
A regular host name, like {@code android.com}.
*
An IPv4 address, like {@code 127.0.0.1}.
*
An IPv6 address, like {@code ::1}. Note that there are no square braces.
*
An encoded IDN, like {@code xn--n3h.net}.
*
*
*
*
URL
{@code host()}
*
{@code http://android.com/}
{@code "android.com"}
*
{@code http://127.0.0.1/}
{@code "127.0.0.1"}
*
{@code http://[::1]/}
{@code "::1"}
*
{@code http://xn--n3h.net/}
{@code "xn--n3h.net"}
*
*/
public String host() {
return host;
}
/**
* Returns the explicitly-specified port if one was provided, or the default port for this URL's
* scheme. For example, this returns 8443 for {@code https://square.com:8443/} and 443 for {@code
* https://square.com/}. The result is in {@code [1..65535]}.
*
*
*
URL
{@code port()}
*
{@code http://host/}
{@code 80}
*
{@code http://host:8000/}
{@code 8000}
*
{@code https://host/}
{@code 443}
*
*/
public int port() {
return port;
}
/**
* Returns 80 if {@code scheme.equals("http")}, 443 if {@code scheme.equals("https")} and -1
* otherwise.
*/
public static int defaultPort(String scheme) {
if (scheme.equals("http")) {
return 80;
} else if (scheme.equals("https")) {
return 443;
} else {
return -1;
}
}
/**
* Returns the number of segments in this URL's path. This is also the number of slashes in the
* URL's path, like 3 in {@code http://host/a/b/c}. This is always at least 1.
*
*
*
URL
{@code pathSize()}
*
{@code http://host/}
{@code 1}
*
{@code http://host/a/b/c}
{@code 3}
*
{@code http://host/a/b/c/}
{@code 4}
*
*/
public int pathSize() {
return pathSegments.size();
}
/**
* Returns the entire path of this URL encoded for use in HTTP resource resolution. The returned
* path will start with {@code "/"}.
*
*
*
URL
{@code encodedPath()}
*
{@code http://host/}
{@code "/"}
*
{@code http://host/a/b/c}
{@code "/a/b/c"}
*
{@code http://host/a/b%20c/d}
{@code "/a/b%20c/d"}
*
*/
public String encodedPath() {
int pathStart = url.indexOf('/', scheme.length() + 3); // "://".length() == 3.
int pathEnd = delimiterOffset(url, pathStart, url.length(), "?#");
return url.substring(pathStart, pathEnd);
}
static void pathSegmentsToString(StringBuilder out, List pathSegments) {
for (int i = 0, size = pathSegments.size(); i < size; i++) {
out.append('/');
out.append(pathSegments.get(i));
}
}
/**
* Returns a list of encoded path segments like {@code ["a", "b", "c"]} for the URL {@code
* http://host/a/b/c}. This list is never empty though it may contain a single empty string.
*
*
*
URL
{@code encodedPathSegments()}
*
{@code http://host/}
{@code [""]}
*
{@code http://host/a/b/c}
{@code ["a", "b", "c"]}
*
{@code http://host/a/b%20c/d}
{@code ["a", "b%20c", "d"]}
*
*/
public List encodedPathSegments() {
int pathStart = url.indexOf('/', scheme.length() + 3);
int pathEnd = delimiterOffset(url, pathStart, url.length(), "?#");
List result = new ArrayList<>();
for (int i = pathStart; i < pathEnd; ) {
i++; // Skip the '/'.
int segmentEnd = delimiterOffset(url, i, pathEnd, '/');
result.add(url.substring(i, segmentEnd));
i = segmentEnd;
}
return result;
}
/**
* Returns a list of path segments like {@code ["a", "b", "c"]} for the URL {@code
* http://host/a/b/c}. This list is never empty though it may contain a single empty string.
*
*
*
URL
{@code pathSegments()}
*
{@code http://host/}
{@code [""]}
*
{@code http://host/a/b/c"}
{@code ["a", "b", "c"]}
*
{@code http://host/a/b%20c/d"}
{@code ["a", "b c", "d"]}
*
*/
public List pathSegments() {
return pathSegments;
}
/**
* Returns the query of this URL, encoded for use in HTTP resource resolution. The returned string
* may be null (for URLs with no query), empty (for URLs with an empty query) or non-empty (all
* other URLs).
*
*
*
URL
{@code encodedQuery()}
*
{@code http://host/}
null
*
{@code http://host/?}
{@code ""}
*
{@code http://host/?a=apple&k=key+lime}
{@code
* "a=apple&k=key+lime"}
*
{@code http://host/?a=apple&a=apricot}
{@code "a=apple&a=apricot"}
*
{@code http://host/?a=apple&b}
{@code "a=apple&b"}
*
*/
public String encodedQuery() {
if (queryNamesAndValues == null) return null; // No query.
int queryStart = url.indexOf('?') + 1;
int queryEnd = delimiterOffset(url, queryStart + 1, url.length(), '#');
return url.substring(queryStart, queryEnd);
}
static void namesAndValuesToQueryString(StringBuilder out, List namesAndValues) {
for (int i = 0, size = namesAndValues.size(); i < size; i += 2) {
String name = namesAndValues.get(i);
String value = namesAndValues.get(i + 1);
if (i > 0) out.append('&');
out.append(name);
if (value != null) {
out.append('=');
out.append(value);
}
}
}
/**
* Cuts {@code encodedQuery} up into alternating parameter names and values. This divides a query
* string like {@code subject=math&easy&problem=5-2=3} into the list {@code ["subject", "math",
* "easy", null, "problem", "5-2=3"]}. Note that values may be null and may contain '='
* characters.
*/
static List queryStringToNamesAndValues(String encodedQuery) {
List result = new ArrayList<>();
for (int pos = 0; pos <= encodedQuery.length(); ) {
int ampersandOffset = encodedQuery.indexOf('&', pos);
if (ampersandOffset == -1) ampersandOffset = encodedQuery.length();
int equalsOffset = encodedQuery.indexOf('=', pos);
if (equalsOffset == -1 || equalsOffset > ampersandOffset) {
result.add(encodedQuery.substring(pos, ampersandOffset));
result.add(null); // No value for this name.
} else {
result.add(encodedQuery.substring(pos, equalsOffset));
result.add(encodedQuery.substring(equalsOffset + 1, ampersandOffset));
}
pos = ampersandOffset + 1;
}
return result;
}
/**
* Returns this URL's query, like {@code "abc"} for {@code http://host/?abc}. Most callers should
* prefer {@link #queryParameterName} and {@link #queryParameterValue} because these methods offer
* direct access to individual query parameters.
*
*
*
URL
{@code query()}
*
{@code http://host/}
null
*
{@code http://host/?}
{@code ""}
*
{@code http://host/?a=apple&k=key+lime}
{@code "a=apple&k=key
* lime"}
*
{@code http://host/?a=apple&a=apricot}
{@code "a=apple&a=apricot"}
*
{@code http://host/?a=apple&b}
{@code "a=apple&b"}
*
*/
public String query() {
if (queryNamesAndValues == null) return null; // No query.
StringBuilder result = new StringBuilder();
namesAndValuesToQueryString(result, queryNamesAndValues);
return result.toString();
}
/**
* Returns the number of query parameters in this URL, like 2 for {@code
* http://host/?a=apple&b=banana}. If this URL has no query this returns 0. Otherwise it returns
* one more than the number of {@code "&"} separators in the query.
*
*
*
URL
{@code querySize()}
*
{@code http://host/}
{@code 0}
*
{@code http://host/?}
{@code 1}
*
{@code http://host/?a=apple&k=key+lime}
{@code 2}
*
{@code http://host/?a=apple&a=apricot}
{@code 2}
*
{@code http://host/?a=apple&b}
{@code 2}
*
*/
public int querySize() {
return queryNamesAndValues != null ? queryNamesAndValues.size() / 2 : 0;
}
/**
* Returns the first query parameter named {@code name} decoded using UTF-8, or null if there is
* no such query parameter.
*
*
*
URL
{@code queryParameter("a")}
*
{@code http://host/}
null
*
{@code http://host/?}
null
*
{@code http://host/?a=apple&k=key+lime}
{@code "apple"}
*
{@code http://host/?a=apple&a=apricot}
{@code "apple"}
*
{@code http://host/?a=apple&b}
{@code "apple"}
*
*/
public String queryParameter(String name) {
if (queryNamesAndValues == null) return null;
for (int i = 0, size = queryNamesAndValues.size(); i < size; i += 2) {
if (name.equals(queryNamesAndValues.get(i))) {
return queryNamesAndValues.get(i + 1);
}
}
return null;
}
/**
* Returns the distinct query parameter names in this URL, like {@code ["a", "b"]} for {@code
* http://host/?a=apple&b=banana}. If this URL has no query this returns the empty set.
*
*
*
URL
{@code queryParameterNames()}
*
{@code http://host/}
{@code []}
*
{@code http://host/?}
{@code [""]}
*
{@code http://host/?a=apple&k=key+lime}
{@code ["a", "k"]}
*
{@code http://host/?a=apple&a=apricot}
{@code ["a"]}
*
{@code http://host/?a=apple&b}
{@code ["a", "b"]}
*
*/
public Set queryParameterNames() {
if (queryNamesAndValues == null) return Collections.emptySet();
Set result = new LinkedHashSet<>();
for (int i = 0, size = queryNamesAndValues.size(); i < size; i += 2) {
result.add(queryNamesAndValues.get(i));
}
return Collections.unmodifiableSet(result);
}
/**
* Returns all values for the query parameter {@code name} ordered by their appearance in this
* URL. For example this returns {@code ["banana"]} for {@code queryParameterValue("b")} on {@code
* http://host/?a=apple&b=banana}.
*
*
*
URL
{@code queryParameterValues("a")}
{@code
* queryParameterValues("b")}
*
{@code http://host/}
{@code []}
{@code []}
*
{@code http://host/?}
{@code []}
{@code []}
*
{@code http://host/?a=apple&k=key+lime}
{@code ["apple"]}
{@code
* []}
*
{@code http://host/?a=apple&a=apricot}
{@code ["apple",
* "apricot"]}
{@code []}
*
{@code http://host/?a=apple&b}
{@code ["apple"]}
{@code
* [null]}
*
*/
public List queryParameterValues(String name) {
if (queryNamesAndValues == null) return Collections.emptyList();
List result = new ArrayList<>();
for (int i = 0, size = queryNamesAndValues.size(); i < size; i += 2) {
if (name.equals(queryNamesAndValues.get(i))) {
result.add(queryNamesAndValues.get(i + 1));
}
}
return Collections.unmodifiableList(result);
}
/**
* Returns the name of the query parameter at {@code index}. For example this returns {@code "a"}
* for {@code queryParameterName(0)} on {@code http://host/?a=apple&b=banana}. This throws if
* {@code index} is not less than the {@linkplain #querySize query size}.
*
*
*
URL
{@code queryParameterName(0)}
{@code
* queryParameterName(1)}
*
{@code http://host/}
exception
exception
*
{@code http://host/?}
{@code ""}
exception
*
{@code http://host/?a=apple&k=key+lime}
{@code "a"}
{@code
* "k"}
*
{@code http://host/?a=apple&a=apricot}
{@code "a"}
{@code
* "a"}
*
{@code http://host/?a=apple&b}
{@code "a"}
{@code "b"}
*
*/
public String queryParameterName(int index) {
if (queryNamesAndValues == null) throw new IndexOutOfBoundsException();
return queryNamesAndValues.get(index * 2);
}
/**
* Returns the value of the query parameter at {@code index}. For example this returns {@code
* "apple"} for {@code queryParameterName(0)} on {@code http://host/?a=apple&b=banana}. This
* throws if {@code index} is not less than the {@linkplain #querySize query size}.
*
*
*
URL
{@code queryParameterValue(0)}
{@code
* queryParameterValue(1)}
*
{@code http://host/}
exception
exception
*
{@code http://host/?}
null
exception
*
{@code http://host/?a=apple&k=key+lime}
{@code "apple"}
{@code
* "key lime"}
*
{@code http://host/?a=apple&a=apricot}
{@code "apple"}
{@code
* "apricot"}
*
{@code http://host/?a=apple&b}
{@code "apple"}
null
*
*/
public String queryParameterValue(int index) {
if (queryNamesAndValues == null) throw new IndexOutOfBoundsException();
return queryNamesAndValues.get(index * 2 + 1);
}
/**
* Returns this URL's encoded fragment, like {@code "abc"} for {@code http://host/#abc}. This
* returns null if the URL has no fragment.
*
*
*
URL
{@code encodedFragment()}
*
{@code http://host/}
null
*
{@code http://host/#}
{@code ""}
*
{@code http://host/#abc}
{@code "abc"}
*
{@code http://host/#abc|def}
{@code "abc|def"}
*
*/
public String encodedFragment() {
if (fragment == null) return null;
int fragmentStart = url.indexOf('#') + 1;
return url.substring(fragmentStart);
}
/**
* Returns this URL's fragment, like {@code "abc"} for {@code http://host/#abc}. This returns null
* if the URL has no fragment.
*
*
*
URL
{@code fragment()}
*
{@code http://host/}
null
*
{@code http://host/#}
{@code ""}
*
{@code http://host/#abc}
{@code "abc"}
*
{@code http://host/#abc|def}
{@code "abc|def"}
*
*/
public String fragment() {
return fragment;
}
/**
* Returns a string with containing this URL with its username, password, query, and fragment
* stripped, and its path replaced with {@code /...}. For example, redacting {@code
* http://username:[email protected]/path} returns {@code http://example.com/...}.
*/
public String redact() {
return newBuilder("/...")
.username("")
.password("")
.build()
.toString();
}
/**
* Returns the URL that would be retrieved by following {@code link} from this URL, or null if
* the resulting URL is not well-formed.
*/
public HttpUrl resolve(String link) {
Builder builder = newBuilder(link);
return builder != null ? builder.build() : null;
}
public Builder newBuilder() {
Builder result = new 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 = port != defaultPort(scheme) ? port : -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 {@code link} from this URL,
* or null if the resulting URL is not well-formed.
*/
public Builder newBuilder(String link) {
Builder builder = new Builder();
Builder.ParseResult result = builder.parse(this, link);
return result == Builder.ParseResult.SUCCESS ? builder : null;
}
/**
* Returns a new {@code HttpUrl} representing {@code url} if it is a well-formed HTTP or HTTPS
* URL, or null if it isn't.
*/
public static HttpUrl parse(String url) {
Builder builder = new Builder();
Builder.ParseResult result = builder.parse(null, url);
return result == Builder.ParseResult.SUCCESS ? builder.build() : null;
}
/**
* Returns an {@link HttpUrl} for {@code url} if its protocol is {@code http} or {@code https}, or
* null if it has any other protocol.
*/
public static HttpUrl get(URL url) {
return parse(url.toString());
}
/**
* Returns a new {@code HttpUrl} representing {@code url} if it is a well-formed HTTP or HTTPS
* URL, or throws an exception if it isn't.
*
* @throws MalformedURLException if there was a non-host related URL issue
* @throws UnknownHostException if the host was invalid
*/
static HttpUrl getChecked(String url) throws MalformedURLException, UnknownHostException {
Builder builder = new Builder();
Builder.ParseResult result = builder.parse(null, url);
switch (result) {
case SUCCESS:
return builder.build();
case INVALID_HOST:
throw new UnknownHostException("Invalid host: " + url);
case UNSUPPORTED_SCHEME:
case MISSING_SCHEME:
case INVALID_PORT:
default:
throw new MalformedURLException("Invalid URL: " + result + " for " + url);
}
}
public static HttpUrl get(URI uri) {
return parse(uri.toString());
}
@Override public boolean equals(Object other) {
return other instanceof HttpUrl && ((HttpUrl) other).url.equals(url);
}
@Override public int hashCode() {
return url.hashCode();
}
@Override public String toString() {
return url;
}
/**
* Returns the domain name of this URL's {@link #host()} that is one level beneath the public
* suffix by consulting the public suffix list. Returns
* null if this URL's {@link #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
{@code topPrivateDomain()}
*
{@code http://google.com}
{@code "google.com"}
*
{@code http://adwords.google.co.uk}
{@code "google.co.uk"}
*
{@code http://square}
null
*
{@code http://co.uk}
null
*
{@code http://localhost}
null
*
{@code http://127.0.0.1}
null
*
*/
public String topPrivateDomain() {
if (verifyAsIpAddress(host)) return null;
return PublicSuffixDatabase.get().getEffectiveTldPlusOne(host);
}
public static final class Builder {
String scheme;
String encodedUsername = "";
String encodedPassword = "";
String host;
int port = -1;
final List encodedPathSegments = new ArrayList<>();
List encodedQueryNamesAndValues;
String encodedFragment;
public Builder() {
encodedPathSegments.add(""); // The default path is '/' which needs a trailing space.
}
public Builder scheme(String scheme) {
if (scheme == null) {
throw new NullPointerException("scheme == null");
} else if (scheme.equalsIgnoreCase("http")) {
this.scheme = "http";
} else if (scheme.equalsIgnoreCase("https")) {
this.scheme = "https";
} else {
throw new IllegalArgumentException("unexpected scheme: " + scheme);
}
return this;
}
public Builder username(String username) {
if (username == null) throw new NullPointerException("username == null");
this.encodedUsername = canonicalize(username, USERNAME_ENCODE_SET, false, false, false, true);
return this;
}
public Builder encodedUsername(String encodedUsername) {
if (encodedUsername == null) throw new NullPointerException("encodedUsername == null");
this.encodedUsername = canonicalize(
encodedUsername, USERNAME_ENCODE_SET, true, false, false, true);
return this;
}
public Builder password(String password) {
if (password == null) throw new NullPointerException("password == null");
this.encodedPassword = canonicalize(password, PASSWORD_ENCODE_SET, false, false, false, true);
return this;
}
public Builder encodedPassword(String encodedPassword) {
if (encodedPassword == null) throw new NullPointerException("encodedPassword == null");
this.encodedPassword = canonicalize(
encodedPassword, PASSWORD_ENCODE_SET, true, false, false, true);
return this;
}
/**
* @param host either a regular hostname, International Domain Name, IPv4 address, or IPv6
* address.
*/
public Builder host(String host) {
if (host == null) throw new NullPointerException("host == null");
String encoded = canonicalizeHost(host, 0, host.length());
if (encoded == null) throw new IllegalArgumentException("unexpected host: " + host);
this.host = encoded;
return this;
}
public Builder port(int port) {
if (port <= 0 || port > 65535) throw new IllegalArgumentException("unexpected port: " + port);
this.port = port;
return this;
}
int effectivePort() {
return port != -1 ? port : defaultPort(scheme);
}
public Builder addPathSegment(String pathSegment) {
if (pathSegment == null) throw new NullPointerException("pathSegment == null");
push(pathSegment, 0, pathSegment.length(), false, false);
return this;
}
/**
* Adds a set of path segments separated by a slash (either {@code \} or {@code /}). If
* {@code pathSegments} starts with a slash, the resulting URL will have empty path segment.
*/
public Builder addPathSegments(String pathSegments) {
if (pathSegments == null) throw new NullPointerException("pathSegments == null");
return addPathSegments(pathSegments, false);
}
public Builder addEncodedPathSegment(String encodedPathSegment) {
if (encodedPathSegment == null) {
throw new NullPointerException("encodedPathSegment == null");
}
push(encodedPathSegment, 0, encodedPathSegment.length(), false, true);
return this;
}
/**
* Adds a set of encoded path segments separated by a slash (either {@code \} or {@code /}). If
* {@code encodedPathSegments} starts with a slash, the resulting URL will have empty path
* segment.
*/
public Builder addEncodedPathSegments(String encodedPathSegments) {
if (encodedPathSegments == null) {
throw new NullPointerException("encodedPathSegments == null");
}
return addPathSegments(encodedPathSegments, true);
}
private Builder addPathSegments(String pathSegments, boolean alreadyEncoded) {
int offset = 0;
do {
int segmentEnd = delimiterOffset(pathSegments, offset, pathSegments.length(), "/\\");
boolean addTrailingSlash = segmentEnd < pathSegments.length();
push(pathSegments, offset, segmentEnd, addTrailingSlash, alreadyEncoded);
offset = segmentEnd + 1;
} while (offset <= pathSegments.length());
return this;
}
public Builder setPathSegment(int index, String pathSegment) {
if (pathSegment == null) throw new NullPointerException("pathSegment == null");
String canonicalPathSegment = canonicalize(
pathSegment, 0, pathSegment.length(), PATH_SEGMENT_ENCODE_SET, false, false, false, true);
if (isDot(canonicalPathSegment) || isDotDot(canonicalPathSegment)) {
throw new IllegalArgumentException("unexpected path segment: " + pathSegment);
}
encodedPathSegments.set(index, canonicalPathSegment);
return this;
}
public Builder setEncodedPathSegment(int index, String encodedPathSegment) {
if (encodedPathSegment == null) {
throw new NullPointerException("encodedPathSegment == null");
}
String canonicalPathSegment = canonicalize(encodedPathSegment,
0, encodedPathSegment.length(), PATH_SEGMENT_ENCODE_SET, true, false, false, true);
encodedPathSegments.set(index, canonicalPathSegment);
if (isDot(canonicalPathSegment) || isDotDot(canonicalPathSegment)) {
throw new IllegalArgumentException("unexpected path segment: " + encodedPathSegment);
}
return this;
}
public Builder removePathSegment(int index) {
encodedPathSegments.remove(index);
if (encodedPathSegments.isEmpty()) {
encodedPathSegments.add(""); // Always leave at least one '/'.
}
return this;
}
public Builder encodedPath(String encodedPath) {
if (encodedPath == null) throw new NullPointerException("encodedPath == null");
if (!encodedPath.startsWith("/")) {
throw new IllegalArgumentException("unexpected encodedPath: " + encodedPath);
}
resolvePath(encodedPath, 0, encodedPath.length());
return this;
}
public Builder query(String query) {
this.encodedQueryNamesAndValues = query != null
? queryStringToNamesAndValues(canonicalize(
query, QUERY_ENCODE_SET, false, false, true, true))
: null;
return this;
}
public Builder encodedQuery(String encodedQuery) {
this.encodedQueryNamesAndValues = encodedQuery != null
? queryStringToNamesAndValues(
canonicalize(encodedQuery, QUERY_ENCODE_SET, true, false, true, true))
: null;
return this;
}
/** Encodes the query parameter using UTF-8 and adds it to this URL's query string. */
public Builder addQueryParameter(String name, String value) {
if (name == null) throw new NullPointerException("name == null");
if (encodedQueryNamesAndValues == null) encodedQueryNamesAndValues = new ArrayList<>();
encodedQueryNamesAndValues.add(
canonicalize(name, QUERY_COMPONENT_ENCODE_SET, false, false, true, true));
encodedQueryNamesAndValues.add(value != null
? canonicalize(value, QUERY_COMPONENT_ENCODE_SET, false, false, true, true)
: null);
return this;
}
/** Adds the pre-encoded query parameter to this URL's query string. */
public Builder addEncodedQueryParameter(String encodedName, String encodedValue) {
if (encodedName == null) throw new NullPointerException("encodedName == null");
if (encodedQueryNamesAndValues == null) encodedQueryNamesAndValues = new ArrayList<>();
encodedQueryNamesAndValues.add(
canonicalize(encodedName, QUERY_COMPONENT_ENCODE_SET, true, false, true, true));
encodedQueryNamesAndValues.add(encodedValue != null
? canonicalize(encodedValue, QUERY_COMPONENT_ENCODE_SET, true, false, true, true)
: null);
return this;
}
public Builder setQueryParameter(String name, String value) {
removeAllQueryParameters(name);
addQueryParameter(name, value);
return this;
}
public Builder setEncodedQueryParameter(String encodedName, String encodedValue) {
removeAllEncodedQueryParameters(encodedName);
addEncodedQueryParameter(encodedName, encodedValue);
return this;
}
public Builder removeAllQueryParameters(String name) {
if (name == null) throw new NullPointerException("name == null");
if (encodedQueryNamesAndValues == null) return this;
String nameToRemove = canonicalize(
name, QUERY_COMPONENT_ENCODE_SET, false, false, true, true);
removeAllCanonicalQueryParameters(nameToRemove);
return this;
}
public Builder removeAllEncodedQueryParameters(String encodedName) {
if (encodedName == null) throw new NullPointerException("encodedName == null");
if (encodedQueryNamesAndValues == null) return this;
removeAllCanonicalQueryParameters(
canonicalize(encodedName, QUERY_COMPONENT_ENCODE_SET, true, false, true, true));
return this;
}
private void removeAllCanonicalQueryParameters(String canonicalName) {
for (int i = encodedQueryNamesAndValues.size() - 2; i >= 0; i -= 2) {
if (canonicalName.equals(encodedQueryNamesAndValues.get(i))) {
encodedQueryNamesAndValues.remove(i + 1);
encodedQueryNamesAndValues.remove(i);
if (encodedQueryNamesAndValues.isEmpty()) {
encodedQueryNamesAndValues = null;
return;
}
}
}
}
public Builder fragment(String fragment) {
this.encodedFragment = fragment != null
? canonicalize(fragment, FRAGMENT_ENCODE_SET, false, false, false, false)
: null;
return this;
}
public Builder encodedFragment(String encodedFragment) {
this.encodedFragment = encodedFragment != null
? canonicalize(encodedFragment, FRAGMENT_ENCODE_SET, true, false, false, false)
: null;
return this;
}
/**
* Re-encodes the components of this URL so that it satisfies (obsolete) RFC 2396, which is
* particularly strict for certain components.
*/
Builder reencodeForUri() {
for (int i = 0, size = encodedPathSegments.size(); i < size; i++) {
String pathSegment = encodedPathSegments.get(i);
encodedPathSegments.set(i,
canonicalize(pathSegment, PATH_SEGMENT_ENCODE_SET_URI, true, true, false, true));
}
if (encodedQueryNamesAndValues != null) {
for (int i = 0, size = encodedQueryNamesAndValues.size(); i < size; i++) {
String component = encodedQueryNamesAndValues.get(i);
if (component != null) {
encodedQueryNamesAndValues.set(i,
canonicalize(component, QUERY_COMPONENT_ENCODE_SET_URI, true, true, true, true));
}
}
}
if (encodedFragment != null) {
encodedFragment = canonicalize(
encodedFragment, FRAGMENT_ENCODE_SET_URI, true, true, false, false);
}
return this;
}
public HttpUrl build() {
if (scheme == null) throw new IllegalStateException("scheme == null");
if (host == null) throw new IllegalStateException("host == null");
return new HttpUrl(this);
}
@Override public String toString() {
StringBuilder result = new StringBuilder();
result.append(scheme);
result.append("://");
if (!encodedUsername.isEmpty() || !encodedPassword.isEmpty()) {
result.append(encodedUsername);
if (!encodedPassword.isEmpty()) {
result.append(':');
result.append(encodedPassword);
}
result.append('@');
}
if (host.indexOf(':') != -1) {
// Host is an IPv6 address.
result.append('[');
result.append(host);
result.append(']');
} else {
result.append(host);
}
int effectivePort = effectivePort();
if (effectivePort != defaultPort(scheme)) {
result.append(':');
result.append(effectivePort);
}
pathSegmentsToString(result, encodedPathSegments);
if (encodedQueryNamesAndValues != null) {
result.append('?');
namesAndValuesToQueryString(result, encodedQueryNamesAndValues);
}
if (encodedFragment != null) {
result.append('#');
result.append(encodedFragment);
}
return result.toString();
}
enum ParseResult {
SUCCESS,
MISSING_SCHEME,
UNSUPPORTED_SCHEME,
INVALID_PORT,
INVALID_HOST,
}
ParseResult parse(HttpUrl base, String input) {
int pos = skipLeadingAsciiWhitespace(input, 0, input.length());
int limit = skipTrailingAsciiWhitespace(input, pos, input.length());
// Scheme.
int schemeDelimiterOffset = schemeDelimiterOffset(input, pos, limit);
if (schemeDelimiterOffset != -1) {
if (input.regionMatches(true, pos, "https:", 0, 6)) {
this.scheme = "https";
pos += "https:".length();
} else if (input.regionMatches(true, pos, "http:", 0, 5)) {
this.scheme = "http";
pos += "http:".length();
} else {
return ParseResult.UNSUPPORTED_SCHEME; // Not an HTTP scheme.
}
} else if (base != null) {
this.scheme = base.scheme;
} else {
return ParseResult.MISSING_SCHEME; // No scheme.
}
// Authority.
boolean hasUsername = false;
boolean hasPassword = false;
int slashCount = slashCount(input, pos, limit);
if (slashCount >= 2 || base == null || !base.scheme.equals(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) {
int componentDelimiterOffset = delimiterOffset(input, pos, limit, "@/\\?#");
int c = componentDelimiterOffset != limit
? input.charAt(componentDelimiterOffset)
: -1;
switch (c) {
case '@':
// User info precedes.
if (!hasPassword) {
int passwordColonOffset = delimiterOffset(
input, pos, componentDelimiterOffset, ':');
String canonicalUsername = canonicalize(
input, pos, passwordColonOffset, USERNAME_ENCODE_SET, true, false, false, true);
this.encodedUsername = hasUsername
? this.encodedUsername + "%40" + canonicalUsername
: canonicalUsername;
if (passwordColonOffset != componentDelimiterOffset) {
hasPassword = true;
this.encodedPassword = canonicalize(input, passwordColonOffset + 1,
componentDelimiterOffset, PASSWORD_ENCODE_SET, true, false, false, true);
}
hasUsername = true;
} else {
this.encodedPassword = this.encodedPassword + "%40" + canonicalize(input, pos,
componentDelimiterOffset, PASSWORD_ENCODE_SET, true, false, false, true);
}
pos = componentDelimiterOffset + 1;
break;
case -1:
case '/':
case '\\':
case '?':
case '#':
// Host info precedes.
int portColonOffset = portColonOffset(input, pos, componentDelimiterOffset);
if (portColonOffset + 1 < componentDelimiterOffset) {
this.host = canonicalizeHost(input, pos, portColonOffset);
this.port = parsePort(input, portColonOffset + 1, componentDelimiterOffset);
if (this.port == -1) return ParseResult.INVALID_PORT; // Invalid port.
} else {
this.host = canonicalizeHost(input, pos, portColonOffset);
this.port = defaultPort(this.scheme);
}
if (this.host == null) return ParseResult.INVALID_HOST; // Invalid host.
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.charAt(pos) == '#') {
encodedQuery(base.encodedQuery());
}
}
// Resolve the relative path.
int pathDelimiterOffset = delimiterOffset(input, pos, limit, "?#");
resolvePath(input, pos, pathDelimiterOffset);
pos = pathDelimiterOffset;
// Query.
if (pos < limit && input.charAt(pos) == '?') {
int queryDelimiterOffset = delimiterOffset(input, pos, limit, '#');
this.encodedQueryNamesAndValues = queryStringToNamesAndValues(canonicalize(
input, pos + 1, queryDelimiterOffset, QUERY_ENCODE_SET, true, false, true, true));
pos = queryDelimiterOffset;
}
// Fragment.
if (pos < limit && input.charAt(pos) == '#') {
this.encodedFragment = canonicalize(
input, pos + 1, limit, FRAGMENT_ENCODE_SET, true, false, false, false);
}
return ParseResult.SUCCESS;
}
private void resolvePath(String input, int pos, int limit) {
// Read a delimiter.
if (pos == limit) {
// Empty path: keep the base path as-is.
return;
}
char c = input.charAt(pos);
if (c == '/' || c == '\\') {
// Absolute path: reset to the default "/".
encodedPathSegments.clear();
encodedPathSegments.add("");
pos++;
} else {
// Relative path: clear everything after the last '/'.
encodedPathSegments.set(encodedPathSegments.size() - 1, "");
}
// Read path segments.
for (int i = pos; i < limit; ) {
int pathSegmentDelimiterOffset = delimiterOffset(input, i, limit, "/\\");
boolean 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 void push(String input, int pos, int limit, boolean addTrailingSlash,
boolean alreadyEncoded) {
String segment = canonicalize(
input, pos, limit, PATH_SEGMENT_ENCODE_SET, alreadyEncoded, false, false, true);
if (isDot(segment)) {
return; // Skip '.' path segments.
}
if (isDotDot(segment)) {
pop();
return;
}
if (encodedPathSegments.get(encodedPathSegments.size() - 1).isEmpty()) {
encodedPathSegments.set(encodedPathSegments.size() - 1, segment);
} else {
encodedPathSegments.add(segment);
}
if (addTrailingSlash) {
encodedPathSegments.add("");
}
}
private boolean isDot(String input) {
return input.equals(".") || input.equalsIgnoreCase("%2e");
}
private boolean isDotDot(String input) {
return input.equals("..")
|| input.equalsIgnoreCase("%2e.")
|| input.equalsIgnoreCase(".%2e")
|| input.equalsIgnoreCase("%2e%2e");
}
/**
* 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 void pop() {
String removed = encodedPathSegments.remove(encodedPathSegments.size() - 1);
// Make sure the path ends with a '/' by either adding an empty string or clearing a segment.
if (removed.isEmpty() && !encodedPathSegments.isEmpty()) {
encodedPathSegments.set(encodedPathSegments.size() - 1, "");
} else {
encodedPathSegments.add("");
}
}
/**
* Returns the index of the ':' in {@code input} that is after scheme characters. Returns -1 if
* {@code input} does not have a scheme that starts at {@code pos}.
*/
private static int schemeDelimiterOffset(String input, int pos, int limit) {
if (limit - pos < 2) return -1;
char c0 = input.charAt(pos);
if ((c0 < 'a' || c0 > 'z') && (c0 < 'A' || c0 > 'Z')) return -1; // Not a scheme start char.
for (int i = pos + 1; i < limit; i++) {
char c = input.charAt(i);
if ((c >= 'a' && c <= 'z')
|| (c >= 'A' && c <= 'Z')
|| (c >= '0' && c <= '9')
|| c == '+'
|| c == '-'
|| c == '.') {
continue; // Scheme character. Keep going.
} else if (c == ':') {
return i; // Scheme prefix!
} else {
return -1; // Non-scheme character before the first ':'.
}
}
return -1; // No ':'; doesn't start with a scheme.
}
/** Returns the number of '/' and '\' slashes in {@code input}, starting at {@code pos}. */
private static int slashCount(String input, int pos, int limit) {
int slashCount = 0;
while (pos < limit) {
char c = input.charAt(pos);
if (c == '\\' || c == '/') {
slashCount++;
pos++;
} else {
break;
}
}
return slashCount;
}
/** Finds the first ':' in {@code input}, skipping characters between square braces "[...]". */
private static int portColonOffset(String input, int pos, int limit) {
for (int i = pos; i < limit; i++) {
switch (input.charAt(i)) {
case '[':
while (++i < limit) {
if (input.charAt(i) == ']') break;
}
break;
case ':':
return i;
}
}
return limit; // No colon.
}
private static String canonicalizeHost(String input, int pos, int limit) {
// Start by percent decoding the host. The WHATWG spec suggests doing this only after we've
// checked for IPv6 square braces. But Chrome does it first, and that's more lenient.
String percentDecoded = percentDecode(input, pos, limit, false);
// If the input contains a :, it’s an IPv6 address.
if (percentDecoded.contains(":")) {
// If the input is encased in square braces "[...]", drop 'em.
InetAddress inetAddress = percentDecoded.startsWith("[") && percentDecoded.endsWith("]")
? decodeIpv6(percentDecoded, 1, percentDecoded.length() - 1)
: decodeIpv6(percentDecoded, 0, percentDecoded.length());
if (inetAddress == null) return null;
byte[] address = inetAddress.getAddress();
if (address.length == 16) return inet6AddressToAscii(address);
throw new AssertionError();
}
return domainToAscii(percentDecoded);
}
/** Decodes an IPv6 address like 1111:2222:3333:4444:5555:6666:7777:8888 or ::1. */
private static InetAddress decodeIpv6(String input, int pos, int limit) {
byte[] address = new byte[16];
int b = 0;
int compress = -1;
int groupOffset = -1;
for (int i = pos; i < limit; ) {
if (b == address.length) return null; // Too many groups.
// Read a delimiter.
if (i + 2 <= limit && input.regionMatches(i, "::", 0, 2)) {
// Compression "::" delimiter, which is anywhere in the input, including its prefix.
if (compress != -1) return null; // Multiple "::" delimiters.
i += 2;
b += 2;
compress = b;
if (i == limit) break;
} else if (b != 0) {
// Group separator ":" delimiter.
if (input.regionMatches(i, ":", 0, 1)) {
i++;
} else if (input.regionMatches(i, ".", 0, 1)) {
// If we see a '.', rewind to the beginning of the previous group and parse as IPv4.
if (!decodeIpv4Suffix(input, groupOffset, limit, address, b - 2)) return null;
b += 2; // We rewound two bytes and then added four.
break;
} else {
return null; // Wrong delimiter.
}
}
// Read a group, one to four hex digits.
int value = 0;
groupOffset = i;
for (; i < limit; i++) {
char c = input.charAt(i);
int hexDigit = decodeHexDigit(c);
if (hexDigit == -1) break;
value = (value << 4) + hexDigit;
}
int groupLength = i - groupOffset;
if (groupLength == 0 || groupLength > 4) return null; // Group is the wrong size.
// We've successfully read a group. Assign its value to our byte array.
address[b++] = (byte) ((value >>> 8) & 0xff);
address[b++] = (byte) (value & 0xff);
}
// All done. If compression happened, we need to move bytes to the right place in the
// address. Here's a sample:
//
// input: "1111:2222:3333::7777:8888"
// before: { 11, 11, 22, 22, 33, 33, 00, 00, 77, 77, 88, 88, 00, 00, 00, 00 }
// compress: 6
// b: 10
// after: { 11, 11, 22, 22, 33, 33, 00, 00, 00, 00, 00, 00, 77, 77, 88, 88 }
//
if (b != address.length) {
if (compress == -1) return null; // Address didn't have compression or enough groups.
System.arraycopy(address, compress, address, address.length - (b - compress), b - compress);
Arrays.fill(address, compress, compress + (address.length - b), (byte) 0);
}
try {
return InetAddress.getByAddress(address);
} catch (UnknownHostException e) {
throw new AssertionError();
}
}
/** Decodes an IPv4 address suffix of an IPv6 address, like 1111::5555:6666:192.168.0.1. */
private static boolean decodeIpv4Suffix(
String input, int pos, int limit, byte[] address, int addressOffset) {
int b = addressOffset;
for (int i = pos; i < limit; ) {
if (b == address.length) return false; // Too many groups.
// Read a delimiter.
if (b != addressOffset) {
if (input.charAt(i) != '.') return false; // Wrong delimiter.
i++;
}
// Read 1 or more decimal digits for a value in 0..255.
int value = 0;
int groupOffset = i;
for (; i < limit; i++) {
char c = input.charAt(i);
if (c < '0' || c > '9') break;
if (value == 0 && groupOffset != i) return false; // Reject unnecessary leading '0's.
value = (value * 10) + c - '0';
if (value > 255) return false; // Value out of range.
}
int groupLength = i - groupOffset;
if (groupLength == 0) return false; // No digits.
// We've successfully read a byte.
address[b++] = (byte) value;
}
if (b != addressOffset + 4) return false; // Too few groups. We wanted exactly four.
return true; // Success.
}
/** Encodes an IPv6 address in canonical form according to RFC 5952. */
private static String inet6AddressToAscii(byte[] address) {
// Go through the address looking for the longest run of 0s. Each group is 2-bytes.
// A run must be longer than one group (section 4.2.2).
// If there are multiple equal runs, the first one must be used (section 4.2.3).
int longestRunOffset = -1;
int longestRunLength = 0;
for (int i = 0; i < address.length; i += 2) {
int currentRunOffset = i;
while (i < 16 && address[i] == 0 && address[i + 1] == 0) {
i += 2;
}
int currentRunLength = i - currentRunOffset;
if (currentRunLength > longestRunLength && currentRunLength >= 4) {
longestRunOffset = currentRunOffset;
longestRunLength = currentRunLength;
}
}
// Emit each 2-byte group in hex, separated by ':'. The longest run of zeroes is "::".
Buffer result = new Buffer();
for (int i = 0; i < address.length; ) {
if (i == longestRunOffset) {
result.writeByte(':');
i += longestRunLength;
if (i == 16) result.writeByte(':');
} else {
if (i > 0) result.writeByte(':');
int group = (address[i] & 0xff) << 8 | address[i + 1] & 0xff;
result.writeHexadecimalUnsignedLong(group);
i += 2;
}
}
return result.readUtf8();
}
private static int parsePort(String input, int pos, int limit) {
try {
// Canonicalize the port string to skip '\n' etc.
String portString = canonicalize(input, pos, limit, "", false, false, false, true);
int i = Integer.parseInt(portString);
if (i > 0 && i <= 65535) return i;
return -1;
} catch (NumberFormatException e) {
return -1; // Invalid port.
}
}
}
static String percentDecode(String encoded, boolean plusIsSpace) {
return percentDecode(encoded, 0, encoded.length(), plusIsSpace);
}
private List percentDecode(List list, boolean plusIsSpace) {
int size = list.size();
List result = new ArrayList<>(size);
for (int i = 0; i < size; i++) {
String s = list.get(i);
result.add(s != null ? percentDecode(s, plusIsSpace) : null);
}
return Collections.unmodifiableList(result);
}
static String percentDecode(String encoded, int pos, int limit, boolean plusIsSpace) {
for (int i = pos; i < limit; i++) {
char c = encoded.charAt(i);
if (c == '%' || (c == '+' && plusIsSpace)) {
// Slow path: the character at i requires decoding!
Buffer out = new Buffer();
out.writeUtf8(encoded, pos, i);
percentDecode(out, encoded, i, limit, plusIsSpace);
return out.readUtf8();
}
}
// Fast path: no characters in [pos..limit) required decoding.
return encoded.substring(pos, limit);
}
static void percentDecode(Buffer out, String encoded, int pos, int limit, boolean plusIsSpace) {
int codePoint;
for (int i = pos; i < limit; i += Character.charCount(codePoint)) {
codePoint = encoded.codePointAt(i);
if (codePoint == '%' && i + 2 < limit) {
int d1 = decodeHexDigit(encoded.charAt(i + 1));
int d2 = decodeHexDigit(encoded.charAt(i + 2));
if (d1 != -1 && d2 != -1) {
out.writeByte((d1 << 4) + d2);
i += 2;
continue;
}
} else if (codePoint == '+' && plusIsSpace) {
out.writeByte(' ');
continue;
}
out.writeUtf8CodePoint(codePoint);
}
}
static boolean percentEncoded(String encoded, int pos, int limit) {
return pos + 2 < limit
&& encoded.charAt(pos) == '%'
&& decodeHexDigit(encoded.charAt(pos + 1)) != -1
&& decodeHexDigit(encoded.charAt(pos + 2)) != -1;
}
static int decodeHexDigit(char c) {
if (c >= '0' && c <= '9') return c - '0';
if (c >= 'a' && c <= 'f') return c - 'a' + 10;
if (c >= 'A' && c <= 'F') return c - 'A' + 10;
return -1;
}
/**
* Returns a substring of {@code input} on the range {@code [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 {@code 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 asciiOnly true to encode all non-ASCII codepoints.
*/
static String canonicalize(String input, int pos, int limit, String encodeSet,
boolean alreadyEncoded, boolean strict, boolean plusIsSpace, boolean asciiOnly) {
int codePoint;
for (int i = pos; i < limit; i += Character.charCount(codePoint)) {
codePoint = input.codePointAt(i);
if (codePoint < 0x20
|| codePoint == 0x7f
|| codePoint >= 0x80 && asciiOnly
|| encodeSet.indexOf(codePoint) != -1
|| codePoint == '%' && (!alreadyEncoded || strict && !percentEncoded(input, i, limit))
|| codePoint == '+' && plusIsSpace) {
// Slow path: the character at i requires encoding!
Buffer out = new Buffer();
out.writeUtf8(input, pos, i);
canonicalize(out, input, i, limit, encodeSet, alreadyEncoded, strict, plusIsSpace,
asciiOnly);
return out.readUtf8();
}
}
// Fast path: no characters in [pos..limit) required encoding.
return input.substring(pos, limit);
}
static void canonicalize(Buffer out, String input, int pos, int limit, String encodeSet,
boolean alreadyEncoded, boolean strict, boolean plusIsSpace, boolean asciiOnly) {
Buffer utf8Buffer = null; // Lazily allocated.
int codePoint;
for (int i = pos; i < limit; i += Character.charCount(codePoint)) {
codePoint = input.codePointAt(i);
if (alreadyEncoded
&& (codePoint == '\t' || codePoint == '\n' || codePoint == '\f' || codePoint == '\r')) {
// Skip this character.
} else if (codePoint == '+' && plusIsSpace) {
// Encode '+' as '%2B' since we permit ' ' to be encoded as either '+' or '%20'.
out.writeUtf8(alreadyEncoded ? "+" : "%2B");
} else if (codePoint < 0x20
|| codePoint == 0x7f
|| codePoint >= 0x80 && asciiOnly
|| encodeSet.indexOf(codePoint) != -1
|| codePoint == '%' && (!alreadyEncoded || strict && !percentEncoded(input, i, limit))) {
// Percent encode this character.
if (utf8Buffer == null) {
utf8Buffer = new Buffer();
}
utf8Buffer.writeUtf8CodePoint(codePoint);
while (!utf8Buffer.exhausted()) {
int b = utf8Buffer.readByte() & 0xff;
out.writeByte('%');
out.writeByte(HEX_DIGITS[(b >> 4) & 0xf]);
out.writeByte(HEX_DIGITS[b & 0xf]);
}
} else {
// This character doesn't need encoding. Just copy it over.
out.writeUtf8CodePoint(codePoint);
}
}
}
static String canonicalize(String input, String encodeSet, boolean alreadyEncoded, boolean strict,
boolean plusIsSpace, boolean asciiOnly) {
return canonicalize(
input, 0, input.length(), encodeSet, alreadyEncoded, strict, plusIsSpace, asciiOnly);
}
}
