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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "android_webview/native/android_stream_reader_url_request_job.h"
#include "base/android/jni_android.h"
#include "base/android/jni_string.h"
#include "net/base/io_buffer.h"
#include "net/base/mime_util.h"
#include "net/base/net_errors.h"
#include "net/base/net_util.h"
#include "net/http/http_util.h"
#include "net/url_request/url_request.h"
#include "net/url_request/url_request_error_job.h"
#include "net/url_request/url_request_file_job.h"
#include "net/url_request/url_request_job_manager.h"
// Disable "Warnings treated as errors" for input_stream_jni as it's a Java
// system class and we have to generate C++ hooks for all methods in the class
// even if they're unused.
#pragma GCC diagnostic ignored "-Wunused-function"
#include "jni/InputStream_jni.h"
using base::android::AttachCurrentThread;
using base::android::ClearException;
using base::android::ConvertUTF8ToJavaString;
using base::android::ScopedJavaGlobalRef;
using base::android::ScopedJavaLocalRef;
using JNI_InputStream::Java_InputStream_available;
using JNI_InputStream::Java_InputStream_skip;
using JNI_InputStream::Java_InputStream_readI_AB_I_I;
namespace {
// Maximum number of bytes to be read in a single read.
const int kBufferSize = 4096;
} // namespace
bool RegisterAndroidStreamReaderUrlRequestJob(JNIEnv* env) {
return JNI_InputStream::RegisterNativesImpl(env);
}
AndroidStreamReaderURLRequestJob::AndroidStreamReaderURLRequestJob(
net::URLRequest* request,
net::NetworkDelegate* network_delegate,
scoped_ptr<Delegate> delegate)
: URLRequestJob(request, network_delegate),
delegate_(delegate.Pass()) {
DCHECK(delegate_.get());
}
AndroidStreamReaderURLRequestJob::~AndroidStreamReaderURLRequestJob() {
}
void AndroidStreamReaderURLRequestJob::Start() {
JNIEnv* env = AttachCurrentThread();
DCHECK(env);
stream_.Reset(env, delegate_->OpenInputStream(env, request()).obj());
if (!stream_.obj()) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_FAILED));
return;
}
if (VerifyRequestedRange(env) && SkipToRequestedRange(env))
NotifyHeadersComplete();
}
bool AndroidStreamReaderURLRequestJob::VerifyRequestedRange(JNIEnv* env) {
int32_t size = Java_InputStream_available(env, stream_.obj());
if (ClearException(env)) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_FAILED));
return false;
}
if (size <= 0)
return true;
// Check that the requested range was valid.
if (!byte_range_.ComputeBounds(size)) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_REQUEST_RANGE_NOT_SATISFIABLE));
return false;
}
size = byte_range_.last_byte_position() -
byte_range_.first_byte_position() + 1;
DCHECK_GE(size, 0);
set_expected_content_size(size);
return true;
}
bool AndroidStreamReaderURLRequestJob::SkipToRequestedRange(JNIEnv* env) {
// Skip to the start of the requested data. This has to be done in a loop
// because the underlying InputStream is not guaranteed to skip the requested
// number of bytes.
if (byte_range_.first_byte_position() != 0) {
int64_t skipped, bytes_to_skip = byte_range_.first_byte_position();
do {
skipped = Java_InputStream_skip(env, stream_.obj(), bytes_to_skip);
if (ClearException(env)) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_FAILED));
return false;
}
if (skipped <= 0) {
NotifyDone(
net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_REQUEST_RANGE_NOT_SATISFIABLE));
return false;
}
} while ((bytes_to_skip -= skipped) > 0);
}
return true;
}
bool AndroidStreamReaderURLRequestJob::ReadRawData(net::IOBuffer* dest,
int dest_size,
int *bytes_read) {
DCHECK_NE(dest_size, 0);
DCHECK(bytes_read);
DCHECK(stream_.obj());
JNIEnv* env = AttachCurrentThread();
DCHECK(env);
if (!buffer_.obj()) {
// Allocate transfer buffer.
buffer_.Reset(env, env->NewByteArray(kBufferSize));
if (ClearException(env)) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_FAILED));
return false;
}
}
jbyteArray buffer = buffer_.obj();
*bytes_read = 0;
if (!dest_size)
return true;
// Read data in multiples of the buffer size.
while (dest_size > 0) {
int read_size = std::min(dest_size, kBufferSize);
// TODO(skyostil): Make this non-blocking
int32_t byte_count =
Java_InputStream_readI_AB_I_I(env, stream_.obj(), buffer, 0, read_size);
if (byte_count <= 0) {
// net::URLRequestJob will call NotifyDone for us after the end of the
// file is reached.
break;
}
if (ClearException(env)) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_FAILED));
return false;
}
#ifndef NDEBUG
int32_t buffer_length = env->GetArrayLength(buffer);
DCHECK_GE(read_size, byte_count);
DCHECK_GE(buffer_length, byte_count);
#endif // NDEBUG
// Copy the data over to the provided C++ side buffer.
DCHECK_GE(dest_size, byte_count);
env->GetByteArrayRegion(buffer, 0, byte_count,
reinterpret_cast<jbyte*>(dest->data() + *bytes_read));
if (ClearException(env)) {
NotifyDone(net::URLRequestStatus(net::URLRequestStatus::FAILED,
net::ERR_FAILED));
return false;
}
*bytes_read += byte_count;
dest_size -= byte_count;
}
return true;
}
bool AndroidStreamReaderURLRequestJob::GetMimeType(
std::string* mime_type) const {
JNIEnv* env = AttachCurrentThread();
DCHECK(env);
return delegate_->GetMimeType(env,
request(),
stream_.obj(),
mime_type);
}
bool AndroidStreamReaderURLRequestJob::GetCharset(
std::string* charset) {
JNIEnv* env = AttachCurrentThread();
DCHECK(env);
return delegate_->GetCharset(env,
request(),
stream_.obj(),
charset);
}
void AndroidStreamReaderURLRequestJob::SetExtraRequestHeaders(
const net::HttpRequestHeaders& headers) {
std::string range_header;
if (headers.GetHeader(net::HttpRequestHeaders::kRange, &range_header)) {
// We only care about "Range" header here.
std::vector<net::HttpByteRange> ranges;
if (net::HttpUtil::ParseRangeHeader(range_header, &ranges)) {
if (ranges.size() == 1) {
byte_range_ = ranges[0];
} else {
// We don't support multiple range requests in one single URL request,
// because we need to do multipart encoding here.
NotifyDone(net::URLRequestStatus(
net::URLRequestStatus::FAILED,
net::ERR_REQUEST_RANGE_NOT_SATISFIABLE));
}
}
}
}
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