httpapiexsas.c

00001 // Copyright (c) Microsoft. All rights reserved.
00002 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
00003 
00004 #include <stdlib.h>
00005 #include "azure_c_shared_utility/gballoc.h"
00006 #include <stddef.h>
00007 #include <time.h>
00008 #include "azure_c_shared_utility/agenttime.h"
00009 #include "azure_c_shared_utility/strings.h"
00010 #include "azure_c_shared_utility/buffer_.h"
00011 #include "azure_c_shared_utility/sastoken.h"
00012 #include "azure_c_shared_utility/httpheaders.h"
00013 #include "azure_c_shared_utility/httpapiex.h"
00014 #include "azure_c_shared_utility/httpapiexsas.h"
00015 #include "azure_c_shared_utility/xlogging.h"
00016 
00017 typedef struct HTTPAPIEX_SAS_STATE_TAG
00018 {
00019     STRING_HANDLE key;
00020     STRING_HANDLE uriResource;
00021     STRING_HANDLE keyName;
00022 }HTTPAPIEX_SAS_STATE;
00023 
00024 
00025 HTTPAPIEX_SAS_HANDLE HTTPAPIEX_SAS_Create(STRING_HANDLE key, STRING_HANDLE uriResource, STRING_HANDLE keyName)
00026 {
00027     HTTPAPIEX_SAS_HANDLE result = NULL;
00028     if (key == NULL)
00029     {
00030         /*Codes_SRS_HTTPAPIEXSAS_06_001: [If the parameter key is NULL then HTTPAPIEX_SAS_Create shall return NULL.]*/
00031         LogError("No key passed to HTTPAPIEX_SAS_Create.");
00032     }
00033     else if (uriResource == NULL)
00034     {
00035         /*Codes_SRS_HTTPAPIEXSAS_06_002: [If the parameter uriResource is NULL then HTTPAPIEX_SAS_Create shall return NULL.]*/
00036         LogError("No uri resource passed to HTTPAPIEX_SAS_Create.");
00037     }
00038     else if (keyName == NULL)
00039     {
00040         /*Codes_SRS_HTTPAPIEXSAS_06_003: [If the parameter keyName is NULL then HTTPAPIEX_SAS_Create shall return NULL.]*/
00041         LogError("No key name passed to HTTPAPIEX_SAS_Create.");
00042     }
00043     else
00044     {
00045         /*Codes_SRS_HTTPAPIEXSAS_01_001: [ HTTPAPIEX_SAS_Create shall create a new instance of HTTPAPIEX_SAS and return a non-NULL handle to it. ]*/
00046         HTTPAPIEX_SAS_STATE* state = (HTTPAPIEX_SAS_STATE*)malloc(sizeof(HTTPAPIEX_SAS_STATE));
00047         /*Codes_SRS_HTTPAPIEXSAS_06_004: [If there are any other errors in the instantiation of this handle then HTTPAPIEX_SAS_Create shall return NULL.]*/
00048         if (state != NULL)
00049         {
00050             state->key = NULL;
00051             state->uriResource = NULL;
00052             state->keyName = NULL;
00053             if (((state->key = STRING_clone(key)) == NULL) ||
00054                 ((state->uriResource = STRING_clone(uriResource)) == NULL) ||
00055                 ((state->keyName = STRING_clone(keyName)) == NULL))
00056             {
00057                 /*Codes_SRS_HTTPAPIEXSAS_06_004: [If there are any other errors in the instantiation of this handle then HTTPAPIEX_SAS_Create shall return NULL.]*/
00058                 LogError("Unable to clone the arguments.");
00059                 HTTPAPIEX_SAS_Destroy(state);
00060             }
00061             else
00062             {
00063                 result = state;
00064             }
00065         }
00066     }
00067     return result;
00068 }
00069 
00070 void HTTPAPIEX_SAS_Destroy(HTTPAPIEX_SAS_HANDLE handle)
00071 {
00072     /*Codes_SRS_HTTPAPIEXSAS_06_005: [If the parameter handle is NULL then HTTAPIEX_SAS_Destroy shall do nothing and return.]*/
00073     if (handle)
00074     {
00075         HTTPAPIEX_SAS_STATE* state = (HTTPAPIEX_SAS_STATE*)handle;
00076         /*Codes_SRS_HTTPAPIEXSAS_06_006: [HTTAPIEX_SAS_Destroy shall deallocate any structures denoted by the parameter handle.]*/
00077         if (state->key)
00078         {
00079             STRING_delete(state->key);
00080         }
00081         if (state->uriResource)
00082         {
00083             STRING_delete(state->uriResource);
00084         }
00085         if (state->keyName)
00086         {
00087             STRING_delete(state->keyName);
00088         }
00089         free(state);
00090     }
00091 }
00092 
00093 HTTPAPIEX_RESULT HTTPAPIEX_SAS_ExecuteRequest(HTTPAPIEX_SAS_HANDLE sasHandle, HTTPAPIEX_HANDLE handle, HTTPAPI_REQUEST_TYPE requestType, const char* relativePath, HTTP_HEADERS_HANDLE requestHttpHeadersHandle, BUFFER_HANDLE requestContent, unsigned int* statusCode, HTTP_HEADERS_HANDLE responseHeadersHandle, BUFFER_HANDLE responseContent)
00094 {
00095     /*Codes_SRS_HTTPAPIEXSAS_06_007: [If the parameter sasHandle is NULL then HTTPAPIEX_SAS_ExecuteRequest shall simply invoke HTTPAPIEX_ExecuteRequest with the remaining parameters (following sasHandle) as its arguments and shall return immediately with the result of that call as the result of HTTPAPIEX_SAS_ExecuteRequest.]*/
00096     if (sasHandle != NULL)
00097     {
00098         /*Codes_SRS_HTTPAPIEXSAS_06_008: [if the parameter requestHttpHeadersHandle is NULL then fallthrough.]*/
00099         if (requestHttpHeadersHandle != NULL)
00100         {
00101             /*Codes_SRS_HTTPAPIEXSAS_06_009: [HTTPHeaders_FindHeaderValue shall be invoked with the requestHttpHeadersHandle as its first argument and the string "Authorization" as its second argument.]*/
00102             /*Codes_SRS_HTTPAPIEXSAS_06_010: [If the return result of the invocation of HTTPHeaders_FindHeaderValue is NULL then fallthrough.]*/
00103             if (HTTPHeaders_FindHeaderValue(requestHttpHeadersHandle, "Authorization") != NULL)
00104             {
00105                 HTTPAPIEX_SAS_STATE* state = (HTTPAPIEX_SAS_STATE*)sasHandle;
00106                 /*Codes_SRS_HTTPAPIEXSAS_06_018: [A value of type time_t that shall be known as currentTime is obtained from calling get_time.]*/
00107                 time_t currentTime = get_time(NULL);
00108                 /*Codes_SRS_HTTPAPIEXSAS_06_019: [If the value of currentTime is (time_t)-1 is then fallthrough.]*/
00109                 if (currentTime == (time_t)-1)
00110                 {
00111                     LogError("Time does not appear to be working.");
00112                 }
00113                 else
00114                 {
00115                     /*Codes_SRS_HTTPAPIEXSAS_06_011: [SASToken_Create shall be invoked.]*/
00116                     /*Codes_SRS_HTTPAPIEXSAS_06_012: [If the return result of SASToken_Create is NULL then fallthrough.]*/
00117                     size_t expiry = (size_t)(difftime(currentTime, 0) + 3600);
00118                     STRING_HANDLE newSASToken = SASToken_Create(state->key, state->uriResource, state->keyName, expiry);
00119                     if (newSASToken != NULL)
00120                     {
00121                         /*Codes_SRS_HTTPAPIEXSAS_06_013: [HTTPHeaders_ReplaceHeaderNameValuePair shall be invoked with "Authorization" as its second argument and STRING_c_str (newSASToken) as its third argument.]*/
00122                         if (HTTPHeaders_ReplaceHeaderNameValuePair(requestHttpHeadersHandle, "Authorization", STRING_c_str(newSASToken)) != HTTP_HEADERS_OK)
00123                         {
00124                             /*Codes_SRS_HTTPAPIEXSAS_06_014: [If the result of the invocation of HTTPHeaders_ReplaceHeaderNameValuePair is NOT HTTP_HEADERS_OK then fallthrough.]*/
00125                             LogError("Unable to replace the old SAS Token.");
00126                         }
00127                         /*Codes_SRS_HTTPAPIEXSAS_06_015: [STRING_delete(newSASToken) will be invoked.]*/
00128                         STRING_delete(newSASToken);
00129                     }
00130                     else
00131                     {
00132                         LogError("Unable to create a new SAS token.");
00133                     }
00134                 }
00135             }
00136         }
00137     }
00138     /*Codes_SRS_HTTPAPIEXSAS_06_016: [HTTPAPIEX_ExecuteRequest with the remaining parameters (following sasHandle) as its arguments will be invoked and the result of that call is the result of HTTPAPIEX_SAS_ExecuteRequest.]*/
00139     return HTTPAPIEX_ExecuteRequest(handle,requestType,relativePath,requestHttpHeadersHandle,requestContent,statusCode,responseHeadersHandle,responseContent);
00140 }