chrome/common/cloud_print/cloud_print_helpers.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/common/cloud_print/cloud_print_helpers.h"
   6
   7 #include "base/json/json_reader.h"
   8 #include "base/logging.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/rand_util.h"
  11 #include "base/stringprintf.h"
  12 #include "base/values.h"
  13 #include "googleurl/src/gurl.h"
  14
  15 namespace cloud_print {
  16
  17 const char kPrinterListValue[] = "printers";
  18 const char kSuccessValue[] = "success";
  19
  20 // Certain cloud print requests require Chrome's X-CloudPrint-Proxy header.
  21 const char kChromeCloudPrintProxyHeader[] = "X-CloudPrint-Proxy: Chrome";
  22
  23 std::string AppendPathToUrl(const GURL& url, const std::string& path) {
  24   DCHECK_NE(path[0], '/');
  25   std::string ret = url.path();
  26   if (url.has_path() && (ret[ret.length() - 1] != '/'))
  27     ret += '/';
  28   ret += path;
  29   return ret;
  30 }
  31
  32 GURL GetUrlForSearch(const GURL& cloud_print_server_url) {
  33   std::string path(AppendPathToUrl(cloud_print_server_url, "search"));
  34   GURL::Replacements replacements;
  35   replacements.SetPathStr(path);
  36   return cloud_print_server_url.ReplaceComponents(replacements);
  37 }
  38
  39 GURL GetUrlForSubmit(const GURL& cloud_print_server_url) {
  40   std::string path(AppendPathToUrl(cloud_print_server_url, "submit"));
  41   GURL::Replacements replacements;
  42   replacements.SetPathStr(path);
  43   return cloud_print_server_url.ReplaceComponents(replacements);
  44 }
  45
  46 bool ParseResponseJSON(const std::string& response_data,
  47                        bool* succeeded,
  48                        DictionaryValue** response_dict) {
  49   scoped_ptr<Value> message_value(base::JSONReader::Read(response_data));
  50   if (!message_value.get())
  51     return false;
  52
  53   if (!message_value->IsType(Value::TYPE_DICTIONARY))
  54     return false;
  55
  56   scoped_ptr<DictionaryValue> response_dict_local(
  57       static_cast<DictionaryValue*>(message_value.release()));
  58   if (succeeded &&
  59       !response_dict_local->GetBoolean(cloud_print::kSuccessValue, succeeded))
  60     *succeeded = false;
  61   if (response_dict)
  62     *response_dict = response_dict_local.release();
  63   return true;
  64 }
  65
  66 void AddMultipartValueForUpload(const std::string& value_name,
  67                                 const std::string& value,
  68                                 const std::string& mime_boundary,
  69                                 const std::string& content_type,
  70                                 std::string* post_data) {
  71   DCHECK(post_data);
  72   // First line is the boundary
  73   post_data->append("--" + mime_boundary + "\r\n");
  74   // Next line is the Content-disposition
  75   post_data->append(StringPrintf("Content-Disposition: form-data; "
  76                    "name=\"%s\"\r\n", value_name.c_str()));
  77   if (!content_type.empty()) {
  78     // If Content-type is specified, the next line is that
  79     post_data->append(StringPrintf("Content-Type: %s\r\n",
  80                       content_type.c_str()));
  81   }
  82   // Leave an empty line and append the value.
  83   post_data->append(StringPrintf("\r\n%s\r\n", value.c_str()));
  84 }
  85
  86 // Create a MIME boundary marker (27 '-' characters followed by 16 hex digits).
  87 void CreateMimeBoundaryForUpload(std::string* out) {
  88   int r1 = base::RandInt(0, kint32max);
  89   int r2 = base::RandInt(0, kint32max);
  90   base::SStringPrintf(out, "---------------------------%08X%08X", r1, r2);
  91 }
  92
  93 }  // namespace cloud_print