(Unicode 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.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

#include <CkRestW.h>
#include <CkBinDataW.h>
#include <CkAuthAzureStorageW.h>
#include <CkStringBuilderW.h>

void ChilkatSample(void)
    {
    // 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.

    CkRestW rest;

    // Connect to the Azure Storage Blob Service
    bool bTls = true;
    int port = 443;
    bool bAutoReconnect = true;
    // In this example, the storage account name is "chilkat".
    bool success = rest.Connect(L"chilkat.file.core.windows.net",port,bTls,bAutoReconnect);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

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

    // Provide Azure Cloud credentials for the REST calls.
    CkAuthAzureStorageW azAuth;
    azAuth.put_AccessKey(L"AZURE_ACCESS_KEY");
    // The account name used here should match the 1st part of the domain passed in the call to Connect (above).
    azAuth.put_Account(L"chilkat");
    azAuth.put_Scheme(L"SharedKey");
    azAuth.put_Service(L"File");
    // This causes the "x-ms-version: 2021-08-06" header to be automatically added.
    azAuth.put_XMsVersion(L"2021-08-06");
    success = rest.SetAuthAzureStorage(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:
    rest.AddHeader(L"x-ms-type",L"file");

    // This required header specifies the final size of the file (or the maximum size it can be).
    CkStringBuilderW sbFileSize;
    sbFileSize.AppendInt(jpgData.get_NumBytes());
    rest.AddHeader(L"x-ms-content-length",sbFileSize.getAsString());

    // 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"
    const wchar_t *responseStr = rest.fullRequestNoBody(L"PUT",L"/pip/wildlife/antarctic/penguins.jpg");
    if (rest.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        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 (rest.get_ResponseStatusCode() != 201) {
        // Examine the request/response to see what happened.
        wprintf(L"response status code = %d\n",rest.get_ResponseStatusCode());
        wprintf(L"response status text = %s\n",rest.responseStatusText());
        wprintf(L"response header: %s\n",rest.responseHeader());
        wprintf(L"response body (if any): %s\n",responseStr);
        wprintf(L"---\n");
        wprintf(L"LastRequestStartLine: %s\n",rest.lastRequestStartLine());
        wprintf(L"LastRequestHeader: %s\n",rest.lastRequestHeader());
        return;
    }

    wprintf(L"Successfully created penguins.jpg\n");

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

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

    // 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

    CkStringBuilderW sbRange;
    sbRange.Append(L"bytes=0-");
    sbRange.AppendInt(jpgData.get_NumBytes() - 1);

    rest.AddHeader(L"x-ms-range",sbRange.getAsString());

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

    CkStringBuilderW sbResponseBody;
    // IMPORTANT:  Don't forget the "?comp=range" at the end of the path passed in the 2nd argument.
    success = rest.FullRequestBd(L"PUT",L"/pip/wildlife/antarctic/penguins.jpg?comp=range",jpgData,sbResponseBody);
    if (success != true) {
        // This would indicate a failure where no response was received.
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    // A 201 response indicates the data was uploaded.
    if (rest.get_ResponseStatusCode() != 201) {
        // Examine the request/response to see what happened.
        wprintf(L"response status code = %d\n",rest.get_ResponseStatusCode());
        wprintf(L"response status text = %s\n",rest.responseStatusText());
        wprintf(L"response header: %s\n",rest.responseHeader());
        wprintf(L"response body (if any): %s\n",responseStr);
        wprintf(L"---\n");
        wprintf(L"LastRequestStartLine: %s\n",rest.lastRequestStartLine());
        wprintf(L"LastRequestHeader: %s\n",rest.lastRequestHeader());
        return;
    }

    wprintf(L"Successfully uploaded data into penguins.jpg\n");
    }