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(Unicode C) REST Upload Bandwidth ThrottleDemonstrates how to use upload bandwidth throttling with the REST API. This example will upload a file to Drobox using a file stream, with a limit on the bandwidth that can be used for the transfer.
#include <C_CkSocketW.h> #include <C_CkRestW.h> #include <C_CkJsonObjectW.h> #include <C_CkStreamW.h> #include <C_CkDateTimeW.h> #include <C_CkDtObjW.h> void ChilkatSample(void) { HCkSocketW socket; int maxWaitMs; BOOL success; HCkRestW rest; HCkJsonObjectW json; HCkStreamW fileStream; const wchar_t *responseStr; HCkJsonObjectW jsonResp; int size; const wchar_t *rev; const wchar_t *clientModified; HCkDateTimeW ckdt; BOOL bLocalTime; HCkDtObjW dt; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // A Dropbox access token should have been previously obtained. // Dropbox access tokens do not expire. // See Dropbox Access Token. // To use bandwidth throttling, the connection should be made using the socket API. // This provides numerous properties to customize the connection, such as // BandwidthThrottleDown, BandwidthThrottleUp, ClientIpAddress, ClintPort, Http Proxy, // KeepAlive, PreferIpv6, RequireSslCertVerify, SoRcvBuf, SoSndBuf, SoReuseAddr, // SOCKS proxy, TcpNoSDelay, TlsPinSet, TlsCipherSuite, SslAllowedCiphers, etc. socket = CkSocketW_Create(); maxWaitMs = 5000; success = CkSocketW_Connect(socket,L"content.dropboxapi.com",443,TRUE,maxWaitMs); if (success != TRUE) { wprintf(L"%s\n",CkSocketW_lastErrorText(socket)); wprintf(L"Connect Fail Reason: %d\n",CkSocketW_getConnectFailReason(socket)); CkSocketW_Dispose(socket); return; } // Set the upload bandwidth throttle rate to 50000 bytes per second. CkSocketW_putBandwidthThrottleUp(socket,50000); rest = CkRestW_Create(); // Tell the REST object to use the connected socket. CkRestW_UseConnection(rest,socket,TRUE); // The remainder of this example is identical to the example at: // Dropbox File Stream Upload. // Add request headers. CkRestW_AddHeader(rest,L"Content-Type",L"application/octet-stream"); CkRestW_AddHeader(rest,L"Authorization",L"Bearer DROPBOX_ACCESS_TOKEN"); // The upload "parameters" contained in JSON passed in an HTTP request header. // This is the JSON to be added in this example: // { // "path": "/Homework/lit/hamlet.xml", // "mode": "add", // "autorename": true, // "mute": false // } json = CkJsonObjectW_Create(); CkJsonObjectW_AppendString(json,L"path",L"/Homework/lit/hamlet.xml"); CkJsonObjectW_AppendString(json,L"mode",L"add"); CkJsonObjectW_AppendBool(json,L"autorename",TRUE); CkJsonObjectW_AppendBool(json,L"mute",FALSE); CkRestW_AddHeader(rest,L"Dropbox-API-Arg",CkJsonObjectW_emit(json)); // Almost ready to go... // Let's setup a file stream to point to a file. fileStream = CkStreamW_Create(); CkStreamW_putSourceFile(fileStream,L"qa_data/xml/hamlet.xml"); // Do the upload. The URL is https://content.dropboxapi.com/2/files/upload. // We already connected to content.dropboxapi.com using TLS (i.e. HTTPS), // so now we only need to specify the path "/2/files/upload". // Note: The file is streamed directly from disk. (The entire // file will not be loaded into memory.) responseStr = CkRestW_fullRequestStream(rest,L"POST",L"/2/files/upload",fileStream); if (CkRestW_getLastMethodSuccess(rest) != TRUE) { wprintf(L"%s\n",CkRestW_lastErrorText(rest)); CkSocketW_Dispose(socket); CkRestW_Dispose(rest); CkJsonObjectW_Dispose(json); CkStreamW_Dispose(fileStream); return; } // When successful, Dropbox responds with a 200 response code. if (CkRestW_getResponseStatusCode(rest) != 200) { // Examine the request/response to see what happened. wprintf(L"response status code = %d\n",CkRestW_getResponseStatusCode(rest)); wprintf(L"response status text = %s\n",CkRestW_responseStatusText(rest)); wprintf(L"response header: %s\n",CkRestW_responseHeader(rest)); wprintf(L"response body (if any): %s\n",responseStr); wprintf(L"---\n"); wprintf(L"LastRequestStartLine: %s\n",CkRestW_lastRequestStartLine(rest)); wprintf(L"LastRequestHeader: %s\n",CkRestW_lastRequestHeader(rest)); CkSocketW_Dispose(socket); CkRestW_Dispose(rest); CkJsonObjectW_Dispose(json); CkStreamW_Dispose(fileStream); return; } // The response is JSON. jsonResp = CkJsonObjectW_Create(); CkJsonObjectW_putEmitCompact(jsonResp,FALSE); CkJsonObjectW_Load(jsonResp,responseStr); // Show the JSON response. wprintf(L"%s\n",CkJsonObjectW_emit(jsonResp)); // Returns JSON that looks like this: // { // "name": "hamlet.xml", // "path_lower": "/homework/lit/hamlet.xml", // "path_display": "/Homework/lit/hamlet.xml", // "id": "id:74FkdeNuyKAAAAAAAAAAAQ", // "client_modified": "2016-06-02T23:19:00Z", // "server_modified": "2016-06-02T23:19:00Z", // "rev": "9482db15f", // "size": 279658 // } // Sample code to get data from the JSON response: size = CkJsonObjectW_IntOf(jsonResp,L"size"); wprintf(L"size = %d\n",size); rev = CkJsonObjectW_stringOf(jsonResp,L"rev"); wprintf(L"rev = %s\n",rev); clientModified = CkJsonObjectW_stringOf(jsonResp,L"client_modified"); ckdt = CkDateTimeW_Create(); CkDateTimeW_SetFromTimestamp(ckdt,clientModified); bLocalTime = TRUE; dt = CkDateTimeW_GetDtObj(ckdt,bLocalTime); wprintf(L"%d/%d/%d %d:%d\n",CkDtObjW_getDay(dt),CkDtObjW_getMonth(dt),CkDtObjW_getYear(dt),CkDtObjW_getHour(dt),CkDtObjW_getMinute(dt)); CkDtObjW_Dispose(dt); CkSocketW_Dispose(socket); CkRestW_Dispose(rest); CkJsonObjectW_Dispose(json); CkStreamW_Dispose(fileStream); CkJsonObjectW_Dispose(jsonResp); CkDateTimeW_Dispose(ckdt); } |
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