(C) Azure Storage: List Blobs

Azure Storage Blob Service REST API: Sample code to fetch the list of blobs in the specified container.

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#include <C_CkRest.h>
#include <C_CkAuthAzureStorage.h>
#include <C_CkXml.h>
#include <C_CkDateTime.h>
#include <C_CkDtObj.h>

void ChilkatSample(void)
    {
    HCkRest rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    BOOL success;
    HCkAuthAzureStorage azAuth;
    const char *responseStr;
    HCkXml xml;
    HCkDateTime lastMod;
    int numBlobs;
    int i;
    HCkDtObj dt;
    const char *lastModStr;

    // Azure Blob Service Example: List the blobs in a specified container.
    // See also: https://msdn.microsoft.com/en-us/library/azure/dd135734.aspx

    // 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.blob.core.windows.net",port,bTls,bAutoReconnect);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        return;
    }

    // Provide Azure Cloud credentials for the REST call.
    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,"Blob");
    // This causes the "x-ms-version: 2020-08-04" header to be automatically added.
    CkAuthAzureStorage_putXMsVersion(azAuth,"2020-08-04");
    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.

    // The expected success response is a 200 response status code with an XML response body.
    // In this example, we are listing the blobs in the container named "mycontainer".
    responseStr = CkRest_fullRequestNoBody(rest,"GET","/mycontainer?restype=container&comp=list");
    if (CkRest_getLastMethodSuccess(rest) != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkAuthAzureStorage_Dispose(azAuth);
        return;
    }

    // When successful, the Azure Storage service will respond with a 200 response status code,
    // with an XML response body.

    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));
        CkRest_Dispose(rest);
        CkAuthAzureStorage_Dispose(azAuth);
        return;
    }

    // Load the XML response for parsing.
    // An example of the response XML is shown below.
    xml = CkXml_Create();
    success = CkXml_LoadXml(xml,responseStr);

    printf("%s\n",CkXml_getXml(xml));

    // Let's iterate over the blobs...

    lastMod = CkDateTime_Create();

    numBlobs = CkXml_NumChildrenAt(xml,"Blobs");
    i = 0;
    while (i < numBlobs) {
        printf("---- Blob %d ----\n",i);
        CkXml_putI(xml,i);
        printf("Name: %s\n",CkXml_getChildContent(xml,"Blobs|Blob[i]|Name"));
        printf("Content-Length: %s\n",CkXml_getChildContent(xml,"Blobs|Blob[i]|Properties|Content-Length"));
        printf("Content-Type: %s\n",CkXml_getChildContent(xml,"Blobs|Blob[i]|Properties|Content-Type"));
        printf("Content-MD5: %s\n",CkXml_getChildContent(xml,"Blobs|Blob[i]|Properties|Content-MD5"));
        printf("BlobType: %s\n",CkXml_getChildContent(xml,"Blobs|Blob[i]|Properties|BlobType"));
        printf("LeaseStatus: %s\n",CkXml_getChildContent(xml,"Blobs|Blob[i]|Properties|LeaseStatus"));
        CkDateTime_SetFromRfc822(lastMod,CkXml_getChildContent(xml,"Blobs|Blob[i]|Properties|Last-Modified"));
        dt = CkDateTime_GetDtObj(lastMod,TRUE);
        printf("Last-Modified YMD: %d,%d,%d\n",CkDtObj_getYear(dt),CkDtObj_getMonth(dt),CkDtObj_getDay(dt));
        CkDtObj_Dispose(dt);
        i = i + 1;
    }

    printf("-------------------------\n");

    // Use the ChilkatPath method to get information for a specific blob:

    // For example, let's say we want the Last-Modified date/time for
    // the blob named "helloWorld.txt"
    lastModStr = CkXml_chilkatPath(xml,"/C/Name,helloWorld.txt|..|Properties|Last-Modified|*");
    printf("helloWorld.txt Last-Modified: %s\n",lastModStr);

    printf("Success.\n");

    // <?xml version="1.0" encoding="utf-8" ?>
    // <EnumerationResults ServiceEndpoint="https://chilkat.blob.core.windows.net/" ContainerName="test">
    //     <Blobs>
    //         <Blob>
    //             <Name>hamletC.xml</Name>
    //             <Properties>
    //                 <Last-Modified>Mon, 02 May 2016 23:50:30 GMT</Last-Modified>
    //                 <Etag>0x8D372E48B6D323A</Etag>
    //                 <Content-Length>279658</Content-Length>
    //                 <Content-Type>application/octet-stream</Content-Type>
    //                 <Content-Encoding />
    //                 <Content-Language />
    //                 <Content-MD5>4E6prI9haw81xadSLeEj3Q==</Content-MD5>
    //                 <Cache-Control />
    //                 <Content-Disposition>attachment; filename="hamletC.xml"</Content-Disposition>
    //                 <BlobType>BlockBlob</BlobType>
    //                 <LeaseStatus>unlocked</LeaseStatus>
    //                 <LeaseState>available</LeaseState>
    //             </Properties>
    //         </Blob>
    //         <Blob>
    //             <Name>helloWorld.txt</Name>
    //             <Properties>
    //                 <Last-Modified>Mon, 02 May 2016 15:21:55 GMT</Last-Modified>
    //                 <Etag>0x8D3729D7EE38299</Etag>
    //                 <Content-Length>12</Content-Length>
    //                 <Content-Type>application/octet-stream</Content-Type>
    //                 <Content-Encoding />
    //                 <Content-Language />
    //                 <Content-MD5>7Qdih1MuhjZehB6Sv8UNjA==</Content-MD5>
    //                 <Cache-Control />
    //                 <Content-Disposition>attachment; filename="helloWorld.txt"</Content-Disposition>
    //                 <BlobType>BlockBlob</BlobType>
    //                 <LeaseStatus>unlocked</LeaseStatus>
    //                 <LeaseState>available</LeaseState>
    //             </Properties>
    //         </Blob>
    //         <Blob>
    //             <Name>thisIsATest.txt</Name>
    //             <Properties>
    //                 <Last-Modified>Tue, 03 May 2016 00:22:13 GMT</Last-Modified>
    //                 <Etag>0x8D372E8F9B2A62E</Etag>
    //                 <Content-Length>1600</Content-Length>
    //                 <Content-Type>application/octet-stream</Content-Type>
    //                 <Content-Encoding />
    //                 <Content-Language />
    //                 <Content-MD5>FhgUXYfePg2ItsraPmz0Xg==</Content-MD5>
    //                 <Cache-Control />
    //                 <Content-Disposition>attachment; filename="thisIsATest.txt"</Content-Disposition>
    //                 <BlobType>BlockBlob</BlobType>
    //                 <LeaseStatus>unlocked</LeaseStatus>
    //                 <LeaseState>available</LeaseState>
    //             </Properties>
    //         </Blob>
    //     </Blobs>
    //     <NextMarker />
    // </EnumerationResults>
    // 


    CkRest_Dispose(rest);
    CkAuthAzureStorage_Dispose(azAuth);
    CkXml_Dispose(xml);
    CkDateTime_Dispose(lastMod);

    }