093bf07d3640dcf9c015e80297f1f4977207e5d1
[WebKit-https.git] / WebCore / workers / WorkerScriptLoader.cpp
1 /*
2  * Copyright (C) 2009 Apple Inc. All Rights Reserved.
3  * Copyright (C) 2009 Google Inc. All Rights Reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
25  *
26  */
27
28 #include "config.h"
29
30 #if ENABLE(WORKERS)
31
32 #include "WorkerScriptLoader.h"
33
34 #include "GenericWorkerTask.h"
35 #include "ResourceRequest.h"
36 #include "ScriptExecutionContext.h"
37 #include "SecurityOrigin.h"
38 #include "WorkerContext.h"
39 #include "WorkerScriptLoaderClient.h"
40 #include "WorkerThreadableLoader.h"
41 #include <wtf/OwnPtr.h>
42 #include <wtf/UnusedParam.h>
43
44 namespace WebCore {
45
46 WorkerScriptLoader::WorkerScriptLoader()
47     : m_client(0)
48     , m_failed(false)
49     , m_identifier(0)
50 {
51 }
52
53 static CrossOriginRedirectPolicy toCrossOriginRedirectPolicy(CrossOriginLoadPolicy crossOriginLoadPolicy)
54 {
55     return (crossOriginLoadPolicy == DenyCrossOriginLoad) ? DenyCrossOriginRedirect : AllowCrossOriginRedirect;
56 }
57
58 void WorkerScriptLoader::loadSynchronously(ScriptExecutionContext* scriptExecutionContext, const String& url, URLCompletionPolicy urlCompletionPolicy, CrossOriginLoadPolicy crossOriginLoadPolicy)
59 {
60     OwnPtr<ResourceRequest> request(createResourceRequest(scriptExecutionContext, url, urlCompletionPolicy, crossOriginLoadPolicy));
61     if (!request)
62         return;
63
64     ASSERT(scriptExecutionContext->isWorkerContext());
65     WorkerThreadableLoader::loadResourceSynchronously(static_cast<WorkerContext*>(scriptExecutionContext), *request, *this, AllowStoredCredentials, toCrossOriginRedirectPolicy(crossOriginLoadPolicy));
66 }
67     
68 void WorkerScriptLoader::loadAsynchronously(ScriptExecutionContext* scriptExecutionContext, const String& url, URLCompletionPolicy urlCompletionPolicy, CrossOriginLoadPolicy crossOriginLoadPolicy, WorkerScriptLoaderClient* client)
69 {
70     ASSERT(client);
71     m_client = client;
72
73     OwnPtr<ResourceRequest> request(createResourceRequest(scriptExecutionContext, url, urlCompletionPolicy, crossOriginLoadPolicy));
74     if (!request)
75         return;
76
77     m_threadableLoader = ThreadableLoader::create(scriptExecutionContext, this, *request, DoNotSendLoadCallbacks, DoNotSniffContent, AllowStoredCredentials, toCrossOriginRedirectPolicy(crossOriginLoadPolicy));
78 }
79
80 static void notifyLoadErrorTask(ScriptExecutionContext* context, WorkerScriptLoader* loader)
81 {
82     UNUSED_PARAM(context);
83     loader->notifyError();
84 }
85
86 PassOwnPtr<ResourceRequest> WorkerScriptLoader::createResourceRequest(ScriptExecutionContext* scriptExecutionContext, const String& url, URLCompletionPolicy urlCompletionPolicy, CrossOriginLoadPolicy crossOriginLoadPolicy)
87 {
88     if (urlCompletionPolicy == CompleteURL) {
89         m_url = scriptExecutionContext->completeURL(url);
90         if (url.isEmpty() || !m_url.isValid()) {
91             scriptExecutionContext->postTask(createCallbackTask(&notifyLoadErrorTask, this));
92             return 0;
93         }
94     } else
95         m_url = KURL(url);
96
97     if (crossOriginLoadPolicy == DenyCrossOriginLoad && !scriptExecutionContext->securityOrigin()->canAccess(SecurityOrigin::create(m_url).get())) {
98         scriptExecutionContext->postTask(createCallbackTask(&notifyLoadErrorTask, this));
99         return 0;
100     }
101
102     OwnPtr<ResourceRequest> request(new ResourceRequest(m_url));
103     request->setHTTPMethod("GET");
104
105     return request.release();
106 }
107     
108 void WorkerScriptLoader::didReceiveResponse(const ResourceResponse& response)
109 {
110     if (response.httpStatusCode() / 100 != 2 && response.httpStatusCode()) {
111         m_failed = true;
112         return;
113     }
114     m_responseEncoding = response.textEncodingName();
115 }
116
117 void WorkerScriptLoader::didReceiveData(const char* data, int len)
118 {
119     if (m_failed)
120         return;
121
122     if (!m_decoder) {
123         if (!m_responseEncoding.isEmpty())
124             m_decoder = TextResourceDecoder::create("text/javascript", m_responseEncoding);
125         else
126             m_decoder = TextResourceDecoder::create("text/javascript", "UTF-8");
127     }
128
129     if (!len)
130         return;
131     
132     if (len == -1)
133         len = strlen(data);
134     
135     m_script += m_decoder->decode(data, len);
136 }
137
138 void WorkerScriptLoader::didFinishLoading(unsigned long identifier)
139 {
140     if (m_failed)
141         return;
142
143     if (m_decoder)
144         m_script += m_decoder->flush();
145
146     m_identifier = identifier;
147     notifyFinished();
148 }
149
150 void WorkerScriptLoader::didFail(const ResourceError&)
151 {
152     notifyError();
153 }
154
155 void WorkerScriptLoader::didFailRedirectCheck()
156 {
157     notifyError();
158 }
159
160 void WorkerScriptLoader::didReceiveAuthenticationCancellation(const ResourceResponse&)
161 {
162     notifyError();
163 }
164
165 void WorkerScriptLoader::notifyError()
166 {
167     m_failed = true;
168     notifyFinished();
169 }
170     
171 void WorkerScriptLoader::notifyFinished()
172 {
173     if (m_client)
174         m_client->notifyFinished();
175 }
176
177 } // namespace WebCore
178
179 #endif // ENABLE(WORKERS)