11320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// Copyright 2013 The Chromium Authors. All rights reserved.
21320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// Use of this source code is governed by a BSD-style license that can be
31320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci// found in the LICENSE file.
41320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci
51320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "chrome/browser/extensions/blob_reader.h"
61320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci
71320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "base/format_macros.h"
81320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "base/strings/string_util.h"
91320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "base/strings/stringprintf.h"
101320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "chrome/browser/profiles/profile.h"
111320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "content/public/browser/browser_thread.h"
121320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "net/http/http_request_headers.h"
131320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "net/http/http_response_headers.h"
141320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "net/url_request/url_fetcher.h"
151320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "net/url_request/url_request_context.h"
161320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "net/url_request/url_request_context_getter.h"
171320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci
181320f92c476a1ad9d19dba2a48c72b75566198e9Primiano TucciBlobReader::BlobReader(Profile* profile,
191320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci                       const std::string& blob_uuid,
201320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci                       BlobReadCallback callback)
211320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci    : callback_(callback) {
221320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
231320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  GURL blob_url;
241320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  if (StartsWithASCII(blob_uuid, "blob:blobinternal", true)) {
251320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci    // TODO(michaeln): remove support for deprecated blob urls
261320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci    blob_url = GURL(blob_uuid);
271320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  } else {
281320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci    blob_url = GURL(std::string("blob:uuid/") + blob_uuid);
291320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  }
301320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  DCHECK(blob_url.is_valid());
311320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  fetcher_.reset(net::URLFetcher::Create(
321320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci      blob_url, net::URLFetcher::GET,
331320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci      this));
341320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  fetcher_->SetRequestContext(profile->GetRequestContext());
351320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci}
361320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci
371320f92c476a1ad9d19dba2a48c72b75566198e9Primiano TucciBlobReader::~BlobReader() { DCHECK_CURRENTLY_ON(content::BrowserThread::UI); }
381320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci
391320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tuccivoid BlobReader::SetByteRange(int64 offset, int64 length) {
401320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
411320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  CHECK_GE(offset, 0);
421320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  CHECK_GT(length, 0);
431320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci  CHECK_LE(offset, kint64max - length);
441320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci
45  net::HttpRequestHeaders headers;
46  headers.SetHeader(
47      net::HttpRequestHeaders::kRange,
48      base::StringPrintf("bytes=%" PRId64 "-%" PRId64, offset,
49                         offset + length - 1));
50  fetcher_->SetExtraRequestHeaders(headers.ToString());
51}
52
53void BlobReader::Start() {
54  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
55  fetcher_->Start();
56}
57
58// Overridden from net::URLFetcherDelegate.
59void BlobReader::OnURLFetchComplete(const net::URLFetcher* source) {
60  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
61  scoped_ptr<std::string> response(new std::string);
62  int64 first = 0, last = 0, length = 0;
63  source->GetResponseAsString(response.get());
64  source->GetResponseHeaders()->GetContentRange(&first, &last, &length);
65  callback_.Run(response.Pass(), length);
66
67  delete this;
68}
69