C

REST Upload Bandwidth Throttle

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Demonstrates 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. C

#include <C_CkSocket.h>
#include <C_CkRest.h>
#include <C_CkJsonObject.h>
#include <C_CkStream.h>
#include <C_CkDateTime.h>
#include <C_CkDtObj.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkSocket socket;
    int maxWaitMs;
    HCkRest rest;
    HCkJsonObject json;
    HCkStream fileStream;
    const char *responseStr;
    HCkJsonObject jsonResp;
    int size;
    const char *rev;
    const char *clientModified;
    HCkDateTime ckdt;
    BOOL bLocalTime;
    HCkDtObj dt;

    success = FALSE;

    // 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 = CkSocket_Create();
    maxWaitMs = 5000;
    success = CkSocket_Connect(socket,"content.dropboxapi.com",443,TRUE,maxWaitMs);
    if (success != TRUE) {
        printf("%s\n",CkSocket_lastErrorText(socket));
        printf("Connect Fail Reason: %d\n",CkSocket_getConnectFailReason(socket));
        CkSocket_Dispose(socket);
        return;
    }

    // Set the upload bandwidth throttle rate to 50000 bytes per second.
    CkSocket_putBandwidthThrottleUp(socket,50000);

    rest = CkRest_Create();

    // Tell the REST object to use the connected socket.
    CkRest_UseConnection(rest,socket,TRUE);

    // The remainder of this example is identical to the example at:
    // Dropbox File Stream Upload.

    // Add request headers.
    CkRest_AddHeader(rest,"Content-Type","application/octet-stream");
    CkRest_AddHeader(rest,"Authorization","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 = CkJsonObject_Create();
    CkJsonObject_AppendString(json,"path","/Homework/lit/hamlet.xml");
    CkJsonObject_AppendString(json,"mode","add");
    CkJsonObject_AppendBool(json,"autorename",TRUE);
    CkJsonObject_AppendBool(json,"mute",FALSE);
    CkRest_AddHeader(rest,"Dropbox-API-Arg",CkJsonObject_emit(json));

    // Almost ready to go...
    // Let's setup a file stream to point to a file.
    fileStream = CkStream_Create();
    CkStream_putSourceFile(fileStream,"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 = CkRest_fullRequestStream(rest,"POST","/2/files/upload",fileStream);
    if (CkRest_getLastMethodSuccess(rest) == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkSocket_Dispose(socket);
        CkRest_Dispose(rest);
        CkJsonObject_Dispose(json);
        CkStream_Dispose(fileStream);
        return;
    }

    // When successful, Dropbox responds with a 200 response code.
    if (CkRest_getResponseStatusCode(rest) != 200) {
        // Examine the request/response to see what happened.
        printf("response status code = %d\n",CkRest_getResponseStatusCode(rest));
        printf("response status text = %s\n",CkRest_responseStatusText(rest));
        printf("response header: %s\n",CkRest_responseHeader(rest));
        printf("response body (if any): %s\n",responseStr);
        printf("---\n");
        printf("LastRequestStartLine: %s\n",CkRest_lastRequestStartLine(rest));
        printf("LastRequestHeader: %s\n",CkRest_lastRequestHeader(rest));
        CkSocket_Dispose(socket);
        CkRest_Dispose(rest);
        CkJsonObject_Dispose(json);
        CkStream_Dispose(fileStream);
        return;
    }

    // The response is JSON.
    jsonResp = CkJsonObject_Create();
    CkJsonObject_putEmitCompact(jsonResp,FALSE);
    CkJsonObject_Load(jsonResp,responseStr);

    // Show the JSON response.
    printf("%s\n",CkJsonObject_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 = CkJsonObject_IntOf(jsonResp,"size");
    printf("size = %d\n",size);

    rev = CkJsonObject_stringOf(jsonResp,"rev");
    printf("rev = %s\n",rev);

    clientModified = CkJsonObject_stringOf(jsonResp,"client_modified");
    ckdt = CkDateTime_Create();
    CkDateTime_SetFromTimestamp(ckdt,clientModified);
    bLocalTime = TRUE;
    dt = CkDtObj_Create();
    CkDateTime_ToDtObj(ckdt,bLocalTime,dt);

    printf("%d/%d/%d %d:%d\n",CkDtObj_getDay(dt),CkDtObj_getMonth(dt),CkDtObj_getYear(dt),CkDtObj_getHour(dt),CkDtObj_getMinute(dt));


    CkSocket_Dispose(socket);
    CkRest_Dispose(rest);
    CkJsonObject_Dispose(json);
    CkStream_Dispose(fileStream);
    CkJsonObject_Dispose(jsonResp);
    CkDateTime_Dispose(ckdt);
    CkDtObj_Dispose(dt);

    }