1 | // Copyright (c) Microsoft. All rights reserved.
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2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information.
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3 |
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4 | #include <stdlib.h>
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5 | #include <stdint.h>
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6 |
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7 | #include "azure_c_shared_utility/gballoc.h"
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8 | #include "internal/blob.h"
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9 | #include "internal/iothub_client_ll_uploadtoblob.h"
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10 |
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11 | #include "azure_c_shared_utility/httpapiex.h"
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12 | #include "azure_c_shared_utility/xlogging.h"
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13 | #include "azure_c_shared_utility/azure_base64.h"
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14 | #include "azure_c_shared_utility/shared_util_options.h"
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15 |
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16 | BLOB_RESULT Blob_UploadBlock(
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17 | HTTPAPIEX_HANDLE httpApiExHandle,
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18 | const char* relativePath,
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19 | BUFFER_HANDLE requestContent,
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20 | unsigned int blockID,
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21 | STRING_HANDLE blockIDList,
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22 | unsigned int* httpStatus,
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23 | BUFFER_HANDLE httpResponse)
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24 | {
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25 | BLOB_RESULT result;
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26 |
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27 | if (requestContent == NULL ||
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28 | blockIDList == NULL ||
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29 | relativePath == NULL ||
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30 | httpApiExHandle == NULL ||
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31 | httpStatus == NULL ||
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32 | httpResponse == NULL)
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33 | {
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34 | LogError("invalid argument detected requestContent=%p blockIDList=%p relativePath=%p httpApiExHandle=%p httpStatus=%p httpResponse=%p", requestContent, blockIDList, relativePath, httpApiExHandle, httpStatus, httpResponse);
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35 | result = BLOB_ERROR;
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36 | }
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37 | else if (blockID > 49999) /*outside the expected range of 000000... 049999*/
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38 | {
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39 | LogError("block ID too large");
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40 | result = BLOB_ERROR;
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41 | }
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42 | else
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43 | {
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44 | char temp[7]; /*this will contain 000000... 049999*/
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45 | if (sprintf(temp, "%6u", (unsigned int)blockID) != 6) /*produces 000000... 049999*/
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46 | {
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47 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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48 | LogError("failed to sprintf");
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49 | result = BLOB_ERROR;
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50 | }
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51 | else
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52 | {
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53 | STRING_HANDLE blockIdString = Azure_Base64_Encode_Bytes((const unsigned char*)temp, 6);
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54 | if (blockIdString == NULL)
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55 | {
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56 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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57 | LogError("unable to Azure_Base64_Encode_Bytes");
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58 | result = BLOB_ERROR;
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59 | }
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60 | else
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61 | {
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62 | /*add the blockId base64 encoded to the XML*/
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63 | if (!(
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64 | (STRING_concat(blockIDList, "<Latest>") == 0) &&
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65 | (STRING_concat_with_STRING(blockIDList, blockIdString) == 0) &&
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66 | (STRING_concat(blockIDList, "</Latest>") == 0)
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67 | ))
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68 | {
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69 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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70 | LogError("unable to STRING_concat");
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71 | result = BLOB_ERROR;
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72 | }
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73 | else
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74 | {
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75 | /*Codes_SRS_BLOB_02_022: [ Blob_UploadMultipleBlocksFromSasUri shall construct a new relativePath from following string: base relativePath + "&comp=block&blockid=BASE64 encoded string of blockId" ]*/
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76 | STRING_HANDLE newRelativePath = STRING_construct(relativePath);
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77 | if (newRelativePath == NULL)
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78 | {
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79 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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80 | LogError("unable to STRING_construct");
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81 | result = BLOB_ERROR;
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82 | }
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83 | else
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84 | {
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85 | if (!(
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86 | (STRING_concat(newRelativePath, "&comp=block&blockid=") == 0) &&
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87 | (STRING_concat_with_STRING(newRelativePath, blockIdString) == 0)
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88 | ))
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89 | {
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90 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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91 | LogError("unable to STRING concatenate");
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92 | result = BLOB_ERROR;
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93 | }
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94 | else
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95 | {
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96 | /*Codes_SRS_BLOB_02_024: [ Blob_UploadMultipleBlocksFromSasUri shall call HTTPAPIEX_ExecuteRequest with a PUT operation, passing httpStatus and httpResponse. ]*/
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97 | if (HTTPAPIEX_ExecuteRequest(
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98 | httpApiExHandle,
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99 | HTTPAPI_REQUEST_PUT,
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100 | STRING_c_str(newRelativePath),
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101 | NULL,
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102 | requestContent,
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103 | httpStatus,
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104 | NULL,
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105 | httpResponse) != HTTPAPIEX_OK
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106 | )
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107 | {
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108 | /*Codes_SRS_BLOB_02_025: [ If HTTPAPIEX_ExecuteRequest fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_HTTP_ERROR. ]*/
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109 | LogError("unable to HTTPAPIEX_ExecuteRequest");
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110 | result = BLOB_HTTP_ERROR;
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111 | }
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112 | else if (*httpStatus >= 300)
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113 | {
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114 | /*Codes_SRS_BLOB_02_026: [ Otherwise, if HTTP response code is >=300 then Blob_UploadMultipleBlocksFromSasUri shall succeed and return BLOB_OK. ]*/
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115 | LogError("HTTP status from storage does not indicate success (%d)", (int)*httpStatus);
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116 | result = BLOB_OK;
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117 | }
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118 | else
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119 | {
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120 | /*Codes_SRS_BLOB_02_027: [ Otherwise Blob_UploadMultipleBlocksFromSasUri shall continue execution. ]*/
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121 | result = BLOB_OK;
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122 | }
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123 | }
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124 | STRING_delete(newRelativePath);
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125 | }
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126 | }
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127 | STRING_delete(blockIdString);
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128 | }
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129 | }
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130 | }
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131 | return result;
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132 | }
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133 |
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134 | BLOB_RESULT Blob_UploadMultipleBlocksFromSasUri(const char* SASURI, IOTHUB_CLIENT_FILE_UPLOAD_GET_DATA_CALLBACK_EX getDataCallbackEx, void* context, unsigned int* httpStatus, BUFFER_HANDLE httpResponse, const char* certificates, HTTP_PROXY_OPTIONS *proxyOptions)
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135 | {
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136 | BLOB_RESULT result;
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137 | /*Codes_SRS_BLOB_02_001: [ If SASURI is NULL then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_INVALID_ARG. ]*/
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138 | if (SASURI == NULL)
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139 | {
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140 | LogError("parameter SASURI is NULL");
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141 | result = BLOB_INVALID_ARG;
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142 | }
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143 | else
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144 | {
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145 | /*Codes_SRS_BLOB_02_002: [ If getDataCallbackEx is NULL then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_INVALID_ARG. ]*/
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146 | if (getDataCallbackEx == NULL)
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147 | {
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148 | LogError("IOTHUB_CLIENT_FILE_UPLOAD_GET_DATA_CALLBACK_EX getDataCallbackEx is NULL");
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149 | result = BLOB_INVALID_ARG;
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150 | }
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151 | /*the below define avoid a "condition always false" on some compilers*/
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152 | else
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153 | {
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154 | /*Codes_SRS_BLOB_02_017: [ Blob_UploadMultipleBlocksFromSasUri shall copy from SASURI the hostname to a new const char* ]*/
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155 | /*to find the hostname, the following logic is applied:*/
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156 | /*the hostname starts at the first character after "://"*/
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157 | /*the hostname ends at the first character before the next "/" after "://"*/
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158 | const char* hostnameBegin = strstr(SASURI, "://");
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159 | if (hostnameBegin == NULL)
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160 | {
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161 | /*Codes_SRS_BLOB_02_005: [ If the hostname cannot be determined, then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_INVALID_ARG. ]*/
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162 | LogError("hostname cannot be determined");
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163 | result = BLOB_INVALID_ARG;
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164 | }
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165 | else
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166 | {
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167 | hostnameBegin += 3; /*have to skip 3 characters which are "://"*/
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168 | const char* hostnameEnd = strchr(hostnameBegin, '/');
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169 | if (hostnameEnd == NULL)
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170 | {
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171 | /*Codes_SRS_BLOB_02_005: [ If the hostname cannot be determined, then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_INVALID_ARG. ]*/
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172 | LogError("hostname cannot be determined");
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173 | result = BLOB_INVALID_ARG;
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174 | }
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175 | else
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176 | {
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177 | size_t hostnameSize = hostnameEnd - hostnameBegin;
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178 | char* hostname = (char*)malloc(hostnameSize + 1); /*+1 because of '\0' at the end*/
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179 | if (hostname == NULL)
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180 | {
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181 | /*Codes_SRS_BLOB_02_016: [ If the hostname copy cannot be made then then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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182 | LogError("oom - out of memory");
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183 | result = BLOB_ERROR;
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184 | }
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185 | else
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186 | {
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187 | HTTPAPIEX_HANDLE httpApiExHandle;
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188 | (void)memcpy(hostname, hostnameBegin, hostnameSize);
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189 | hostname[hostnameSize] = '\0';
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190 |
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191 | /*Codes_SRS_BLOB_02_018: [ Blob_UploadMultipleBlocksFromSasUri shall create a new HTTPAPI_EX_HANDLE by calling HTTPAPIEX_Create passing the hostname. ]*/
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192 | httpApiExHandle = HTTPAPIEX_Create(hostname);
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193 | if (httpApiExHandle == NULL)
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194 | {
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195 | /*Codes_SRS_BLOB_02_007: [ If HTTPAPIEX_Create fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR. ]*/
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196 | LogError("unable to create a HTTPAPIEX_HANDLE");
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197 | result = BLOB_ERROR;
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198 | }
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199 | else
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200 | {
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201 | if ((certificates != NULL)&& (HTTPAPIEX_SetOption(httpApiExHandle, "TrustedCerts", certificates) == HTTPAPIEX_ERROR))
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202 | {
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203 | LogError("failure in setting trusted certificates");
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204 | result = BLOB_ERROR;
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205 | }
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206 | else if ((proxyOptions != NULL && proxyOptions->host_address != NULL) && HTTPAPIEX_SetOption(httpApiExHandle, OPTION_HTTP_PROXY, proxyOptions) == HTTPAPIEX_ERROR)
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207 | {
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208 | LogError("failure in setting proxy options");
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209 | result = BLOB_ERROR;
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210 | }
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211 | else
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212 | {
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213 | /*Codes_SRS_BLOB_02_019: [ Blob_UploadMultipleBlocksFromSasUri shall compute the base relative path of the request from the SASURI parameter. ]*/
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214 | const char* relativePath = hostnameEnd; /*this is where the relative path begins in the SasUri*/
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215 |
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216 | /*Codes_SRS_BLOB_02_028: [ Blob_UploadMultipleBlocksFromSasUri shall construct an XML string with the following content: ]*/
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217 | STRING_HANDLE blockIDList = STRING_construct("<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n<BlockList>"); /*the XML "build as we go"*/
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218 | if (blockIDList == NULL)
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219 | {
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220 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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221 | LogError("failed to STRING_construct");
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222 | result = BLOB_HTTP_ERROR;
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223 | }
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224 | else
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225 | {
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226 | /*Codes_SRS_BLOB_02_021: [ For every block returned by `getDataCallbackEx` the following operations shall happen: ]*/
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227 | unsigned int blockID = 0; /* incremented for each new block */
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228 | unsigned int isError = 0; /* set to 1 if a block upload fails or if getDataCallbackEx returns incorrect blocks to upload */
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229 | unsigned int uploadOneMoreBlock = 1; /* set to 1 while getDataCallbackEx returns correct blocks to upload */
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230 | unsigned char const * source; /* data set by getDataCallbackEx */
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231 | size_t size; /* source size set by getDataCallbackEx */
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232 | IOTHUB_CLIENT_FILE_UPLOAD_GET_DATA_RESULT getDataReturnValue;
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233 |
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234 | do
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235 | {
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236 | getDataReturnValue = getDataCallbackEx(FILE_UPLOAD_OK, &source, &size, context);
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237 | if (getDataReturnValue == IOTHUB_CLIENT_FILE_UPLOAD_GET_DATA_ABORT)
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238 | {
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239 | /*Codes_SRS_BLOB_99_004: [ If `getDataCallbackEx` returns `IOTHUB_CLIENT_FILE_UPLOAD_GET_DATA_RESULT_ABORT`, then `Blob_UploadMultipleBlocksFromSasUri` shall exit the loop and return `BLOB_ABORTED`. ]*/
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240 | LogInfo("Upload to blob has been aborted by the user");
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241 | uploadOneMoreBlock = 0;
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242 | result = BLOB_ABORTED;
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243 | }
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244 | else if (source == NULL || size == 0)
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245 | {
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246 | /*Codes_SRS_BLOB_99_002: [ If the size of the block returned by `getDataCallbackEx` is 0 or if the data is NULL, then `Blob_UploadMultipleBlocksFromSasUri` shall exit the loop. ]*/
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247 | uploadOneMoreBlock = 0;
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248 | result = BLOB_OK;
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249 | }
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250 | else
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251 | {
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252 | if (size > BLOCK_SIZE)
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253 | {
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254 | /*Codes_SRS_BLOB_99_001: [ If the size of the block returned by `getDataCallbackEx` is bigger than 4MB, then `Blob_UploadMultipleBlocksFromSasUri` shall fail and return `BLOB_INVALID_ARG`. ]*/
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255 | LogError("tried to upload block of size %lu, max allowed size is %d", (unsigned long)size, BLOCK_SIZE);
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256 | result = BLOB_INVALID_ARG;
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257 | isError = 1;
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258 | }
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259 | else if (blockID >= MAX_BLOCK_COUNT)
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260 | {
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261 | /*Codes_SRS_BLOB_99_003: [ If `getDataCallbackEx` returns more than 50000 blocks, then `Blob_UploadMultipleBlocksFromSasUri` shall fail and return `BLOB_INVALID_ARG`. ]*/
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262 | LogError("unable to upload more than %lu blocks in one blob", (unsigned long)MAX_BLOCK_COUNT);
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263 | result = BLOB_INVALID_ARG;
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264 | isError = 1;
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265 | }
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266 | else
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267 | {
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268 | /*Codes_SRS_BLOB_02_023: [ Blob_UploadMultipleBlocksFromSasUri shall create a BUFFER_HANDLE from source and size parameters. ]*/
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269 | BUFFER_HANDLE requestContent = BUFFER_create(source, size);
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270 | if (requestContent == NULL)
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271 | {
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272 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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273 | LogError("unable to BUFFER_create");
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274 | result = BLOB_ERROR;
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275 | isError = 1;
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276 | }
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277 | else
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278 | {
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279 | result = Blob_UploadBlock(
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280 | httpApiExHandle,
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281 | relativePath,
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282 | requestContent,
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283 | blockID,
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284 | blockIDList,
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285 | httpStatus,
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286 | httpResponse);
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287 |
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288 | BUFFER_delete(requestContent);
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289 | }
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290 |
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291 | /*Codes_SRS_BLOB_02_026: [ Otherwise, if HTTP response code is >=300 then Blob_UploadMultipleBlocksFromSasUri shall succeed and return BLOB_OK. ]*/
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292 | if (result != BLOB_OK || *httpStatus >= 300)
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293 | {
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294 | LogError("unable to Blob_UploadBlock. Returned value=%d, httpStatus=%u", result, (unsigned int)*httpStatus);
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295 | isError = 1;
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296 | }
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297 | }
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298 | blockID++;
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299 | }
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300 | }
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301 | while(uploadOneMoreBlock && !isError);
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302 |
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303 | if (isError || result != BLOB_OK)
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304 | {
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305 | /*do nothing, it will be reported "as is"*/
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306 | }
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307 | else
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308 | {
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309 | /*complete the XML*/
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310 | if (STRING_concat(blockIDList, "</BlockList>") != 0)
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311 | {
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312 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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313 | LogError("failed to STRING_concat");
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314 | result = BLOB_ERROR;
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315 | }
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316 | else
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317 | {
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318 | /*Codes_SRS_BLOB_02_029: [Blob_UploadMultipleBlocksFromSasUri shall construct a new relativePath from following string : base relativePath + "&comp=blocklist"]*/
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319 | STRING_HANDLE newRelativePath = STRING_construct(relativePath);
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320 | if (newRelativePath == NULL)
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321 | {
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322 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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323 | LogError("failed to STRING_construct");
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324 | result = BLOB_ERROR;
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325 | }
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326 | else
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327 | {
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328 | if (STRING_concat(newRelativePath, "&comp=blocklist") != 0)
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329 | {
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330 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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331 | LogError("failed to STRING_concat");
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332 | result = BLOB_ERROR;
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333 | }
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334 | else
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335 | {
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336 | /*Codes_SRS_BLOB_02_030: [ Blob_UploadMultipleBlocksFromSasUri shall call HTTPAPIEX_ExecuteRequest with a PUT operation, passing the new relativePath, httpStatus and httpResponse and the XML string as content. ]*/
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337 | const char* s = STRING_c_str(blockIDList);
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338 | BUFFER_HANDLE blockIDListAsBuffer = BUFFER_create((const unsigned char*)s, strlen(s));
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339 | if (blockIDListAsBuffer == NULL)
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340 | {
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341 | /*Codes_SRS_BLOB_02_033: [ If any previous operation that doesn't have an explicit failure description fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_ERROR ]*/
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342 | LogError("failed to BUFFER_create");
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343 | result = BLOB_ERROR;
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344 | }
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345 | else
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346 | {
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347 | if (HTTPAPIEX_ExecuteRequest(
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348 | httpApiExHandle,
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349 | HTTPAPI_REQUEST_PUT,
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350 | STRING_c_str(newRelativePath),
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351 | NULL,
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352 | blockIDListAsBuffer,
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353 | httpStatus,
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354 | NULL,
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355 | httpResponse
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356 | ) != HTTPAPIEX_OK)
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357 | {
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358 | /*Codes_SRS_BLOB_02_031: [ If HTTPAPIEX_ExecuteRequest fails then Blob_UploadMultipleBlocksFromSasUri shall fail and return BLOB_HTTP_ERROR. ]*/
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359 | LogError("unable to HTTPAPIEX_ExecuteRequest");
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360 | result = BLOB_HTTP_ERROR;
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361 | }
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362 | else
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363 | {
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364 | /*Codes_SRS_BLOB_02_032: [ Otherwise, Blob_UploadMultipleBlocksFromSasUri shall succeed and return BLOB_OK. ]*/
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365 | result = BLOB_OK;
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366 | }
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367 | BUFFER_delete(blockIDListAsBuffer);
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368 | }
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369 | }
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370 | STRING_delete(newRelativePath);
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371 | }
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372 | }
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373 | }
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374 | STRING_delete(blockIDList);
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375 | }
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376 |
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377 | }
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378 | HTTPAPIEX_Destroy(httpApiExHandle);
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379 | }
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380 | free(hostname);
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381 | }
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382 | }
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383 | }
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384 | }
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385 | }
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386 | return result;
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387 | }
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