1/*
2 * Copyright 2010, The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *  * Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 *  * Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#define LOG_TAG "UrlInterceptResponse"
27#include "config.h"
28
29#include "JNIUtility.h"
30#include "UrlInterceptResponse.h"
31#include "WebCoreJni.h"
32
33#include <ScopedLocalRef.h>
34#include <utils/Log.h>
35
36namespace android {
37
38class JavaInputStreamWrapper {
39public:
40    JavaInputStreamWrapper(JNIEnv* env, jobject inputStream)
41            : m_inputStream(env->NewGlobalRef(inputStream))
42            , m_buffer(NULL) {
43        LOG_ALWAYS_FATAL_IF(!m_inputStream);
44        ScopedLocalRef<jclass> inputStreamClass(env, env->FindClass("java/io/InputStream"));
45        LOG_ALWAYS_FATAL_IF(!inputStreamClass.get());
46        m_read = env->GetMethodID(inputStreamClass.get(), "read", "([B)I");
47        LOG_ALWAYS_FATAL_IF(!m_read);
48        m_close = env->GetMethodID(inputStreamClass.get(), "close", "()V");
49        LOG_ALWAYS_FATAL_IF(!m_close);
50    }
51
52    ~JavaInputStreamWrapper() {
53        JNIEnv* env = JSC::Bindings::getJNIEnv();
54        env->CallVoidMethod(m_inputStream, m_close);
55        checkException(env);
56        env->DeleteGlobalRef(m_inputStream);
57        // In case we never call read().
58        if (m_buffer)
59            env->DeleteGlobalRef(m_buffer);
60    }
61
62    void read(std::vector<char>* out) {
63        JNIEnv* env = JSC::Bindings::getJNIEnv();
64        // Initialize our read buffer to the capacity of out.
65        if (!m_buffer) {
66            ScopedLocalRef<jbyteArray> buffer_local(env, env->NewByteArray(out->capacity()));
67            m_buffer = static_cast<jbyteArray>(env->NewGlobalRef(buffer_local.get()));
68        }
69        int size = env->CallIntMethod(m_inputStream, m_read, m_buffer);
70        if (checkException(env) || size < 0)
71            return;
72        // Copy from m_buffer to out.
73        out->resize(size);
74        env->GetByteArrayRegion(m_buffer, 0, size, (jbyte*)&out->front());
75    }
76
77private:
78    jobject    m_inputStream;
79    jbyteArray m_buffer;
80    jmethodID  m_read;
81    jmethodID  m_close;
82};
83
84UrlInterceptResponse::UrlInterceptResponse(JNIEnv* env, jobject response) {
85    ScopedLocalRef<jclass> javaResponse(env, env->FindClass("android/webkit/WebResourceResponse"));
86    LOG_ALWAYS_FATAL_IF(!javaResponse.get());
87    jfieldID mimeType = env->GetFieldID(javaResponse.get(), "mMimeType", "Ljava/lang/String;");
88    LOG_ALWAYS_FATAL_IF(!mimeType);
89    jfieldID encoding = env->GetFieldID(javaResponse.get(), "mEncoding", "Ljava/lang/String;");
90    LOG_ALWAYS_FATAL_IF(!encoding);
91    jfieldID inputStream = env->GetFieldID(javaResponse.get(), "mInputStream", "Ljava/io/InputStream;");
92    LOG_ALWAYS_FATAL_IF(!inputStream);
93
94    ScopedLocalRef<jobject> stream(env, env->GetObjectField(response, inputStream));
95    if (stream.get())
96        m_inputStream.set(new JavaInputStreamWrapper(env, stream.get()));
97
98    ScopedLocalRef<jstring> mimeStr(env, static_cast<jstring>(env->GetObjectField(response, mimeType)));
99    ScopedLocalRef<jstring> encodingStr(env, static_cast<jstring>(env->GetObjectField(response, encoding)));
100
101    if (mimeStr.get()) {
102        const char* s = env->GetStringUTFChars(mimeStr.get(), NULL);
103        m_mimeType.assign(s, env->GetStringUTFLength(mimeStr.get()));
104        env->ReleaseStringUTFChars(mimeStr.get(), s);
105    }
106    if (encodingStr.get()) {
107        const char* s = env->GetStringUTFChars(encodingStr.get(), NULL);
108        m_encoding.assign(s, env->GetStringUTFLength(encodingStr.get()));
109        env->ReleaseStringUTFChars(encodingStr.get(), s);
110    }
111}
112
113UrlInterceptResponse::~UrlInterceptResponse() {
114    // Cannot be inlined because of JavaInputStreamWrapper visibility.
115}
116
117bool UrlInterceptResponse::readStream(std::vector<char>* out) const {
118    if (!m_inputStream)
119        return false;
120    m_inputStream->read(out);
121    return true;
122}
123
124}  // namespace android
125