content/child/web_url_request_util.cc

// Copyright 2014 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 "content/child/web_url_request_util.h"

#include "base/logging.h"
#include "base/strings/string_util.h"
#include "net/base/load_flags.h"
#include "third_party/WebKit/public/platform/WebHTTPHeaderVisitor.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebURLRequest.h"

using blink::WebURLRequest;
using blink::WebString;

namespace content {

namespace {

class HeaderFlattener : public blink::WebHTTPHeaderVisitor {
 public:
  HeaderFlattener() : has_accept_header_(false) {}

  virtual void visitHeader(const WebString& name, const WebString& value) {
    // Headers are latin1.
    const std::string& name_latin1 = name.latin1();
    const std::string& value_latin1 = value.latin1();

    // Skip over referrer headers found in the header map because we already
    // pulled it out as a separate parameter.
    if (LowerCaseEqualsASCII(name_latin1, "referer"))
      return;

    if (LowerCaseEqualsASCII(name_latin1, "accept"))
      has_accept_header_ = true;

    if (!buffer_.empty())
      buffer_.append("\r\n");
    buffer_.append(name_latin1 + ": " + value_latin1);
  }

  const std::string& GetBuffer() {
    // In some cases, WebKit doesn't add an Accept header, but not having the
    // header confuses some web servers.  See bug 808613.
    if (!has_accept_header_) {
      if (!buffer_.empty())
        buffer_.append("\r\n");
      buffer_.append("Accept: */*");
      has_accept_header_ = true;
    }
    return buffer_;
  }

 private:
  std::string buffer_;
  bool has_accept_header_;
};

}  // namespace

ResourceType WebURLRequestToResourceType(const WebURLRequest& request) {
  WebURLRequest::RequestContext requestContext = request.requestContext();
  if (request.frameType() != WebURLRequest::FrameTypeNone) {
    DCHECK(requestContext == WebURLRequest::RequestContextForm ||
           requestContext == WebURLRequest::RequestContextFrame ||
           requestContext == WebURLRequest::RequestContextHyperlink ||
           requestContext == WebURLRequest::RequestContextIframe ||
           requestContext == WebURLRequest::RequestContextInternal ||
           requestContext == WebURLRequest::RequestContextLocation);
    if (request.frameType() == WebURLRequest::FrameTypeTopLevel ||
        request.frameType() == WebURLRequest::FrameTypeAuxiliary) {
      return RESOURCE_TYPE_MAIN_FRAME;
    }
    if (request.frameType() == WebURLRequest::FrameTypeNested)
      return RESOURCE_TYPE_SUB_FRAME;
    NOTREACHED();
    return RESOURCE_TYPE_SUB_RESOURCE;
  }

  switch (requestContext) {
    // Favicon
    case WebURLRequest::RequestContextFavicon:
      return RESOURCE_TYPE_FAVICON;

    // Font
    case WebURLRequest::RequestContextFont:
      return RESOURCE_TYPE_FONT_RESOURCE;

    // Image
    case WebURLRequest::RequestContextImage:
    case WebURLRequest::RequestContextImageSet:
      return RESOURCE_TYPE_IMAGE;

    // Media
    case WebURLRequest::RequestContextAudio:
    case WebURLRequest::RequestContextVideo:
      return RESOURCE_TYPE_MEDIA;

    // Object
    case WebURLRequest::RequestContextEmbed:
    case WebURLRequest::RequestContextObject:
      return RESOURCE_TYPE_OBJECT;

    // Ping
    case WebURLRequest::RequestContextBeacon:
    case WebURLRequest::RequestContextCSPReport:
    case WebURLRequest::RequestContextPing:
      return RESOURCE_TYPE_PING;

    // Prefetch
    case WebURLRequest::RequestContextPrefetch:
      return RESOURCE_TYPE_PREFETCH;

    // Script
    case WebURLRequest::RequestContextImport:
    case WebURLRequest::RequestContextScript:
      return RESOURCE_TYPE_SCRIPT;

    // Style
    case WebURLRequest::RequestContextXSLT:
    case WebURLRequest::RequestContextStyle:
      return RESOURCE_TYPE_STYLESHEET;

    // Subresource
    case WebURLRequest::RequestContextDownload:
    case WebURLRequest::RequestContextManifest:
    case WebURLRequest::RequestContextSubresource:
    case WebURLRequest::RequestContextPlugin:
      return RESOURCE_TYPE_SUB_RESOURCE;

    // TextTrack
    case WebURLRequest::RequestContextTrack:
      return RESOURCE_TYPE_MEDIA;

    // Workers
    case WebURLRequest::RequestContextServiceWorker:
      return RESOURCE_TYPE_SERVICE_WORKER;
    case WebURLRequest::RequestContextSharedWorker:
      return RESOURCE_TYPE_SHARED_WORKER;
    case WebURLRequest::RequestContextWorker:
      return RESOURCE_TYPE_WORKER;

    // Unspecified
    case WebURLRequest::RequestContextInternal:
    case WebURLRequest::RequestContextUnspecified:
      return RESOURCE_TYPE_SUB_RESOURCE;

    // XHR
    case WebURLRequest::RequestContextEventSource:
    case WebURLRequest::RequestContextFetch:
    case WebURLRequest::RequestContextXMLHttpRequest:
      return RESOURCE_TYPE_XHR;

    // These should be handled by the FrameType checks at the top of the
    // function.
    case WebURLRequest::RequestContextForm:
    case WebURLRequest::RequestContextHyperlink:
    case WebURLRequest::RequestContextLocation:
    case WebURLRequest::RequestContextFrame:
    case WebURLRequest::RequestContextIframe:
      NOTREACHED();
      return RESOURCE_TYPE_SUB_RESOURCE;

    default:
      NOTREACHED();
      return RESOURCE_TYPE_SUB_RESOURCE;
  }
}

std::string GetWebURLRequestHeaders(const blink::WebURLRequest& request) {
  HeaderFlattener flattener;
  request.visitHTTPHeaderFields(&flattener);
  return flattener.GetBuffer();
}

int GetLoadFlagsForWebURLRequest(const blink::WebURLRequest& request) {
  int load_flags = net::LOAD_NORMAL;
  GURL url = request.url();
  switch (request.cachePolicy()) {
    case WebURLRequest::ReloadIgnoringCacheData:
      // Required by LayoutTests/http/tests/misc/refresh-headers.php
      load_flags |= net::LOAD_VALIDATE_CACHE;
      break;
    case WebURLRequest::ReloadBypassingCache:
      load_flags |= net::LOAD_BYPASS_CACHE;
      break;
    case WebURLRequest::ReturnCacheDataElseLoad:
      load_flags |= net::LOAD_PREFERRING_CACHE;
      break;
    case WebURLRequest::ReturnCacheDataDontLoad:
      load_flags |= net::LOAD_ONLY_FROM_CACHE;
      break;
    case WebURLRequest::UseProtocolCachePolicy:
      break;
    default:
      NOTREACHED();
  }

  if (request.reportRawHeaders())
    load_flags |= net::LOAD_REPORT_RAW_HEADERS;

  if (!request.allowStoredCredentials()) {
    load_flags |= net::LOAD_DO_NOT_SAVE_COOKIES;
    load_flags |= net::LOAD_DO_NOT_SEND_COOKIES;
  }

  if (!request.allowStoredCredentials())
    load_flags |= net::LOAD_DO_NOT_SEND_AUTH_DATA;

  if (request.requestContext() == WebURLRequest::RequestContextXMLHttpRequest &&
      (url.has_username() || url.has_password())) {
    load_flags |= net::LOAD_DO_NOT_PROMPT_FOR_LOGIN;
  }
  return load_flags;
}

}  // namespace content