(C) Azure File Service: Upload File

Sample code to upload a file to a directory in a share in the Azure File Service. A file is uploaded by first creating the file in the Azure share and then writes a range of bytes to the file. Azure imposes a 4MB limit for each PUT to write a range. Files larger than 4MB need to be uploaded by making multiple "Put Range" calls. This example uploads a file small enough for a single "Put Range" call.

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#include <C_CkRest.h>
#include <C_CkBinData.h>
#include <C_CkAuthAzureStorage.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkRest rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    BOOL success;
    HCkBinData jpgData;
    HCkAuthAzureStorage azAuth;
    HCkStringBuilder sbFileSize;
    const char *responseStr;
    HCkStringBuilder sbRange;
    HCkStringBuilder sbResponseBody;

    // Azure File Service Example: Upload a file.  
    // See:  https://docs.microsoft.com/en-us/rest/api/storageservices/create-share
    // also see: https://docs.microsoft.com/en-us/rest/api/storageservices/put-range

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    rest = CkRest_Create();

    // Connect to the Azure Storage Blob Service
    bTls = TRUE;
    port = 443;
    bAutoReconnect = TRUE;
    // In this example, the storage account name is "chilkat".
    success = CkRest_Connect(rest,"chilkat.file.core.windows.net",port,bTls,bAutoReconnect);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        return;
    }

    // This example will upload a relatively small file (760K), so it may as well 
    // just be load it into memory..
    jpgData = CkBinData_Create();
    CkBinData_LoadFile(jpgData,"qa_data/jpg/penguins.jpg");

    // Provide Azure Cloud credentials for the REST calls.
    azAuth = CkAuthAzureStorage_Create();
    CkAuthAzureStorage_putAccessKey(azAuth,"AZURE_ACCESS_KEY");
    // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
    CkAuthAzureStorage_putAccount(azAuth,"chilkat");
    CkAuthAzureStorage_putScheme(azAuth,"SharedKey");
    CkAuthAzureStorage_putService(azAuth,"File");
    // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
    CkAuthAzureStorage_putXMsVersion(azAuth,"2021-08-06");
    success = CkRest_SetAuthAzureStorage(rest,azAuth);

    // Note: The application does not need to explicitly set the following
    // headers: x-ms-date, Authorization.  These headers
    // are automatically set by Chilkat.

    // However, a few additional headers are required for the "Create File" operation:
    CkRest_AddHeader(rest,"x-ms-type","file");

    // This required header specifies the final size of the file (or the maximum size it can be).
    sbFileSize = CkStringBuilder_Create();
    CkStringBuilder_AppendInt(sbFileSize,CkBinData_getNumBytes(jpgData));
    CkRest_AddHeader(rest,"x-ms-content-length",CkStringBuilder_getAsString(sbFileSize));

    // Send a PUT request to create the file (or replace the file if it already exists).
    // This will initialize the file in the Azure file storage.  To upload content, we'll need
    // to do the "Put Range" operation one or more times.

    // The following will create the file "penguins.jpg" in the share "pip", in the directory "/wildlife/antarctic"
    responseStr = CkRest_fullRequestNoBody(rest,"PUT","/pip/wildlife/antarctic/penguins.jpg");
    if (CkRest_getLastMethodSuccess(rest) != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkBinData_Dispose(jpgData);
        CkAuthAzureStorage_Dispose(azAuth);
        CkStringBuilder_Dispose(sbFileSize);
        return;
    }

    // When successful, the Azure File Service will respond with a 201 (Created) response status code,
    // with no XML response body.  If an error response is returned, there will be an XML response body.

    if (CkRest_getResponseStatusCode(rest) != 201) {
        // 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));
        CkRest_Dispose(rest);
        CkBinData_Dispose(jpgData);
        CkAuthAzureStorage_Dispose(azAuth);
        CkStringBuilder_Dispose(sbFileSize);
        return;
    }

    printf("Successfully created penguins.jpg\n");

    // --------------------------------------------------------------------------------
    // Upload the file data...

    // Make sure the headers from the "Create File" operation are removed.
    CkRest_ClearAllHeaders(rest);

    // The only tricky part here is to correctly add the x-ms-range header.
    // It will be formatted like this:
    // x-ms-range: bytes=0-759623

    sbRange = CkStringBuilder_Create();
    CkStringBuilder_Append(sbRange,"bytes=0-");
    CkStringBuilder_AppendInt(sbRange,CkBinData_getNumBytes(jpgData) - 1);

    CkRest_AddHeader(rest,"x-ms-range",CkStringBuilder_getAsString(sbRange));

    // The x-ms-write header is also required:
    CkRest_AddHeader(rest,"x-ms-write","update");

    sbResponseBody = CkStringBuilder_Create();
    // IMPORTANT:  Don't forget the "?comp=range" at the end of the path passed in the 2nd argument.
    success = CkRest_FullRequestBd(rest,"PUT","/pip/wildlife/antarctic/penguins.jpg?comp=range",jpgData,sbResponseBody);
    if (success != TRUE) {
        // This would indicate a failure where no response was received.
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkBinData_Dispose(jpgData);
        CkAuthAzureStorage_Dispose(azAuth);
        CkStringBuilder_Dispose(sbFileSize);
        CkStringBuilder_Dispose(sbRange);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    // A 201 response indicates the data was uploaded.
    if (CkRest_getResponseStatusCode(rest) != 201) {
        // 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));
        CkRest_Dispose(rest);
        CkBinData_Dispose(jpgData);
        CkAuthAzureStorage_Dispose(azAuth);
        CkStringBuilder_Dispose(sbFileSize);
        CkStringBuilder_Dispose(sbRange);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    printf("Successfully uploaded data into penguins.jpg\n");


    CkRest_Dispose(rest);
    CkBinData_Dispose(jpgData);
    CkAuthAzureStorage_Dispose(azAuth);
    CkStringBuilder_Dispose(sbFileSize);
    CkStringBuilder_Dispose(sbRange);
    CkStringBuilder_Dispose(sbResponseBody);

    }