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play.libs.ws.WSUrlFetch Maven / Gradle / Ivy
package play.libs.ws;
import oauth.signpost.OAuthConsumer;
import oauth.signpost.basic.DefaultOAuthConsumer;
import play.Logger;
import play.libs.IO;
import play.libs.WS.HttpResponse;
import play.libs.WS.WSImpl;
import play.libs.WS.WSRequest;
import play.mvc.Http.Header;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
/**
* Implementation of the WS interface based on Java URL Fetch API.
* This is to be used for example in Google App Engine, where the
* async http client can't be used.
*/
public class WSUrlFetch implements WSImpl {
public WSUrlFetch() {}
public void stop() {}
public play.libs.WS.WSRequest newRequest(String url, String encoding) {
return new WSUrlfetchRequest(url, encoding);
}
public class WSUrlfetchRequest extends WSRequest {
protected WSUrlfetchRequest(String url, String encoding) {
super(url, encoding);
}
private String getPreparedUrl(String method) {
String u = url;
if (parameters != null && !parameters.isEmpty()) {
// If not PUT or POST, we must add these params to the queryString
if (!("PUT".equals(method) || "POST".equals(method))) {
// must add params to queryString/url
StringBuilder sb = new StringBuilder(url);
if (url.indexOf("?")>0) {
sb.append('&');
} else {
sb.append('?');
}
int count=0;
for( Map.Entry e : parameters.entrySet()) {
count++;
String key = e.getKey();
Object value = e.getValue();
if (value == null) continue;
if (value instanceof Collection || value.getClass().isArray()) {
Collection values = value.getClass().isArray() ? Arrays.asList((Object[]) value) : (Collection) value;
for (Object v: values) {
if (count > 1) {
sb.append('&');
}
sb.append(encode(key));
sb.append('=');
sb.append(encode(v.toString()));
}
} else {
if (count > 1) {
sb.append('&');
}
sb.append(encode(key));
sb.append('=');
sb.append(encode(value.toString()));
}
}
u = sb.toString();
// Must clear the parameters to prevent us from using them again
parameters.clear();
}
}
return u;
}
/** Execute a GET request synchronously. */
public HttpResponse get() {
try {
return new HttpUrlfetchResponse(prepare(new URL(getPreparedUrl("GET")), "GET"));
} catch (Exception e) {
Logger.error(e.toString());
throw new RuntimeException(e);
}
}
/** Execute a POST request.*/
public HttpResponse post() {
try {
HttpURLConnection conn = prepare(new URL(getPreparedUrl("POST")), "POST");
return new HttpUrlfetchResponse(conn);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/** Execute a PUT request.*/
public HttpResponse put() {
try {
return new HttpUrlfetchResponse(prepare(new URL(getPreparedUrl("PUT")), "PUT"));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/** Execute a DELETE request.*/
public HttpResponse delete() {
try {
return new HttpUrlfetchResponse(prepare(new URL(getPreparedUrl("DELETE")), "DELETE"));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/** Execute a OPTIONS request.*/
public HttpResponse options() {
try {
return new HttpUrlfetchResponse(prepare(new URL(getPreparedUrl("OPTIONS")), "OPTIONS"));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/** Execute a HEAD request.*/
public HttpResponse head() {
try {
return new HttpUrlfetchResponse(prepare(new URL(getPreparedUrl("HEAD")), "HEAD"));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/** Execute a TRACE request.*/
public HttpResponse trace() {
try {
return new HttpUrlfetchResponse(prepare(new URL(getPreparedUrl("TRACE")), "TRACE"));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private HttpURLConnection prepare(URL url, String method) {
if (this.username != null && this.password != null && this.scheme != null) {
String authString = null;
switch (this.scheme) {
case BASIC: authString = basicAuthHeader(); break;
default: throw new RuntimeException("Scheme " + this.scheme + " not supported by the UrlFetch WS backend.");
}
this.headers.put("Authorization", authString);
}
try {
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod(method);
connection.setDoInput(true);
connection.setInstanceFollowRedirects(this.followRedirects);
connection.setReadTimeout(this.timeout * 1000);
for (String key : this.headers.keySet()) {
connection.setRequestProperty(key, headers.get(key));
}
if (this.oauthToken != null && this.oauthSecret != null) {
OAuthConsumer consumer = new DefaultOAuthConsumer(oauthInfo.consumerKey, oauthInfo.consumerSecret);
consumer.setTokenWithSecret(oauthToken, oauthSecret);
consumer.sign(connection);
}
checkFileBody(connection);
return connection;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private void checkFileBody(HttpURLConnection connection) throws IOException {
/* if (this.fileParams != null) {
connection.setDoOutput(true);
//could be optimized, we know the size of this array.
for (int i = 0; i < this.fileParams.length; i++) {
builder.addBodyPart(new FilePart(this.fileParams[i].paramName,
this.fileParams[i].file,
MimeTypes.getMimeType(this.fileParams[i].file.getName()),
null));
}
if (this.parameters != null) {
for (String key : this.parameters.keySet()) {
Object value = this.parameters.get(key);
if (value instanceof Collection || value.getClass().isArray()) {
Collection values = value.getClass().isArray() ? Arrays.asList((Object[]) value) : (Collection) value;
for (Object v : values) {
builder.addBodyPart(new StringPart(key, v.toString()));
}
} else {
builder.addBodyPart(new StringPart(key, value.toString()));
}
}
}
return;
}*/
if (this.parameters != null && !this.parameters.isEmpty()) {
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset="+encoding);
connection.setDoOutput(true);
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
writer.write(createQueryString());
writer.close();
}
if (this.body != null) {
if (this.parameters != null && !this.parameters.isEmpty()) {
throw new RuntimeException("POST or PUT method with parameters AND body are not supported.");
}
connection.setDoOutput(true);
if(this.mimeType != null) {
connection.setRequestProperty("Content-Type", this.mimeType+"; charset="+encoding);
}
OutputStream out = connection.getOutputStream();
if(this.body instanceof InputStream) {
InputStream bodyStream = (InputStream)this.body;
byte[] buffer = new byte[1024];
int bytesRead;
while( (bytesRead = bodyStream.read(buffer, 0, buffer.length)) > 0) {
out.write(buffer, 0, bytesRead);
}
} else {
try {
byte[] bodyBytes = this.body.toString().getBytes( this.encoding );
out.write( bodyBytes );
} catch ( UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
}
}
}
}
/**
* An HTTP response wrapper
*/
public static class HttpUrlfetchResponse extends HttpResponse {
private String body;
private Integer status;
private String statusText;
private Map> headersMap;
/**
* you shouldnt have to create an HttpResponse yourself
* @param method
*/
public HttpUrlfetchResponse(HttpURLConnection connection) {
try {
this.status = connection.getResponseCode();
this.statusText = connection.getResponseMessage();
this.headersMap = connection.getHeaderFields();
InputStream is = null;
if (this.status >= HttpURLConnection.HTTP_BAD_REQUEST) {
// 4xx/5xx may return a response via getErrorStream()
is = connection.getErrorStream();
} else {
is = connection.getInputStream();
}
if (is != null) this.body = IO.readContentAsString(is, getEncoding());
} catch (Exception ex) {
throw new RuntimeException(ex);
} finally {
connection.disconnect();
}
}
/**
* the HTTP status code
* @return the status code of the http response
*/
@Override
public Integer getStatus() {
return status;
}
/**
* the HTTP status text
* @return the status text of the http response
*/
@Override
public String getStatusText() {
return statusText;
}
@Override
public String getHeader(String key) {
return headersMap.containsKey(key) ? headersMap.get(key).get(0) : null;
}
@Override
public List getHeaders() {
List result = new ArrayList();
for (String key : headersMap.keySet()) {
result.add(new Header(key, headersMap.get(key)));
}
return result;
}
/**
* get the response body as a string
* @return the body of the http response
*/
@Override
public String getString() {
return body;
}
/**
* get the response as a stream
* @return an inputstream
*/
@Override
public InputStream getStream() {
try {
return new ByteArrayInputStream(body.getBytes( getEncoding() ));
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
}
}
}
