components/autofill/core/browser/autofill_xml_parser.cc

   1 // Copyright 2013 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 "components/autofill/core/browser/autofill_xml_parser.h"
   6
   7 #include <string.h>
   8
   9 #include "base/logging.h"
  10 #include "base/strings/string_number_conversions.h"
  11 #include "components/autofill/core/browser/autofill_server_field_info.h"
  12 #include "third_party/webrtc/libjingle/xmllite/qname.h"
  13
  14 namespace autofill {
  15
  16 AutofillXmlParser::AutofillXmlParser()
  17     : succeeded_(true) {
  18 }
  19
  20 AutofillXmlParser::~AutofillXmlParser() {}
  21
  22 void AutofillXmlParser::CharacterData(
  23     buzz::XmlParseContext* context, const char* text, int len) {
  24 }
  25
  26 void AutofillXmlParser::EndElement(buzz::XmlParseContext* context,
  27                                    const char* name) {
  28 }
  29
  30 void AutofillXmlParser::Error(buzz::XmlParseContext* context,
  31                               XML_Error error_code) {
  32   succeeded_ = false;
  33 }
  34
  35 AutofillQueryXmlParser::AutofillQueryXmlParser(
  36     std::vector<AutofillServerFieldInfo>* field_infos,
  37     UploadRequired* upload_required)
  38     : field_infos_(field_infos),
  39       upload_required_(upload_required) {
  40   DCHECK(upload_required_);
  41 }
  42
  43 AutofillQueryXmlParser::~AutofillQueryXmlParser() {}
  44
  45 void AutofillQueryXmlParser::StartElement(buzz::XmlParseContext* context,
  46                                           const char* name,
  47                                           const char** attrs) {
  48   buzz::QName qname = context->ResolveQName(name, false);
  49   const std::string& element = qname.LocalPart();
  50   if (element.compare("autofillqueryresponse") == 0) {
  51     // We check for the upload required attribute below, but if it's not
  52     // present, we use the default upload rates.
  53     *upload_required_ = USE_UPLOAD_RATES;
  54
  55     // |attrs| is a NULL-terminated list of (attribute, value) pairs.
  56     while (*attrs) {
  57       buzz::QName attribute_qname = context->ResolveQName(*attrs, true);
  58       ++attrs;
  59       const std::string& attribute_name = attribute_qname.LocalPart();
  60       if (attribute_name.compare("uploadrequired") == 0) {
  61         if (strcmp(*attrs, "true") == 0)
  62           *upload_required_ = UPLOAD_REQUIRED;
  63         else if (strcmp(*attrs, "false") == 0)
  64           *upload_required_ = UPLOAD_NOT_REQUIRED;
  65       }
  66       ++attrs;
  67     }
  68   } else if (element.compare("field") == 0) {
  69     if (!*attrs) {
  70       // Missing the "autofilltype" attribute, abort.
  71       context->RaiseError(XML_ERROR_ABORTED);
  72       return;
  73     }
  74
  75     // Determine the field type from the attribute value.  There should be one
  76     // attribute (autofilltype) with an integer value.
  77     AutofillServerFieldInfo field_info;
  78     field_info.field_type = UNKNOWN_TYPE;
  79
  80     // |attrs| is a NULL-terminated list of (attribute, value) pairs.
  81     while (*attrs) {
  82       buzz::QName attribute_qname = context->ResolveQName(*attrs, true);
  83       ++attrs;
  84       const std::string& attribute_name = attribute_qname.LocalPart();
  85       if (attribute_name.compare("autofilltype") == 0) {
  86         int value = GetIntValue(context, *attrs);
  87         if (value >= 0 && value < MAX_VALID_FIELD_TYPE)
  88           field_info.field_type = static_cast<ServerFieldType>(value);
  89         else
  90           field_info.field_type = NO_SERVER_DATA;
  91       } else if (field_info.field_type == FIELD_WITH_DEFAULT_VALUE &&
  92                  attribute_name.compare("defaultvalue") == 0) {
  93         field_info.default_value = *attrs;
  94       }
  95       ++attrs;
  96     }
  97
  98     // Record this field type, default value pair.
  99     field_infos_->push_back(field_info);
 100   }
 101 }
 102
 103 void AutofillQueryXmlParser::ParseElementDescriptor(
 104     buzz::XmlParseContext* context,
 105     const char* const* attrs,
 106     WebElementDescriptor* element_descriptor) {
 107   // If both id and css_selector are set, the first one to appear will take
 108   // precedence.
 109   // |attrs| is a NULL-terminated list of (attribute, value) pairs.
 110   while (*attrs) {
 111     buzz::QName attribute_qname = context->ResolveQName(*attrs, true);
 112     ++attrs;
 113     const std::string& attribute_name = attribute_qname.LocalPart();
 114     buzz::QName value_qname = context->ResolveQName(*attrs, true);
 115     ++attrs;
 116     const std::string& attribute_value = value_qname.LocalPart();
 117     if (attribute_name.compare("id") == 0 && !attribute_value.empty()) {
 118       element_descriptor->retrieval_method = WebElementDescriptor::ID;
 119       element_descriptor->descriptor = attribute_value;
 120       break;
 121     } else if (attribute_name.compare("css_selector") == 0 &&
 122                !attribute_value.empty()) {
 123       element_descriptor->retrieval_method = WebElementDescriptor::CSS_SELECTOR;
 124       element_descriptor->descriptor = attribute_value;
 125       break;
 126     }
 127   }
 128 }
 129
 130 int AutofillQueryXmlParser::GetIntValue(buzz::XmlParseContext* context,
 131                                         const char* attribute) {
 132   int value = 0;
 133   if (!base::StringToInt(attribute, &value)) {
 134     context->RaiseError(XML_ERROR_SYNTAX);
 135     return 0;
 136   }
 137   return value;
 138 }
 139
 140 AutofillUploadXmlParser::AutofillUploadXmlParser(double* positive_upload_rate,
 141                                                  double* negative_upload_rate)
 142     : succeeded_(false),
 143       positive_upload_rate_(positive_upload_rate),
 144       negative_upload_rate_(negative_upload_rate) {
 145   DCHECK(positive_upload_rate_);
 146   DCHECK(negative_upload_rate_);
 147 }
 148
 149 void AutofillUploadXmlParser::StartElement(buzz::XmlParseContext* context,
 150                                            const char* name,
 151                                            const char** attrs) {
 152   buzz::QName qname = context->ResolveQName(name, false);
 153   const std::string &element = qname.LocalPart();
 154   if (element.compare("autofilluploadresponse") == 0) {
 155     // Loop over all attributes to get the upload rates.
 156     while (*attrs) {
 157       buzz::QName attribute_qname = context->ResolveQName(attrs[0], true);
 158       const std::string &attribute_name = attribute_qname.LocalPart();
 159       if (attribute_name.compare("positiveuploadrate") == 0) {
 160         *positive_upload_rate_ = GetDoubleValue(context, attrs[1]);
 161       } else if (attribute_name.compare("negativeuploadrate") == 0) {
 162         *negative_upload_rate_ = GetDoubleValue(context, attrs[1]);
 163       }
 164       attrs += 2;  // We peeked at attrs[0] and attrs[1], skip past both.
 165     }
 166   }
 167 }
 168
 169 double AutofillUploadXmlParser::GetDoubleValue(buzz::XmlParseContext* context,
 170                                                const char* attribute) {
 171   double value = 0;
 172   if (!base::StringToDouble(attribute, &value)) {
 173     context->RaiseError(XML_ERROR_SYNTAX);
 174     return 0.0;
 175   }
 176   return value;
 177 }
 178
 179 }  // namespace autofill