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Unicode C
Azure Storage: List Blobs
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Azure Storage Blob Service REST API: Sample code to fetch the list of blobs in the specified container.Chilkat Unicode C Downloads
#include <C_CkRestW.h>
#include <C_CkAuthAzureStorageW.h>
#include <C_CkXmlW.h>
#include <C_CkDateTimeW.h>
#include <C_CkDtObjW.h>
void ChilkatSample(void)
{
BOOL success;
HCkRestW rest;
BOOL bTls;
int port;
BOOL bAutoReconnect;
HCkAuthAzureStorageW azAuth;
const wchar_t *responseStr;
HCkXmlW xml;
HCkDateTimeW lastMod;
int numBlobs;
int i;
HCkDtObjW dt;
const wchar_t *lastModStr;
success = FALSE;
// 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 = CkRestW_Create();
// Connect to the Azure Storage Blob Service
bTls = TRUE;
port = 443;
bAutoReconnect = TRUE;
// In this example, the storage account name is "chilkat".
success = CkRestW_Connect(rest,L"chilkat.blob.core.windows.net",port,bTls,bAutoReconnect);
if (success == FALSE) {
wprintf(L"%s\n",CkRestW_lastErrorText(rest));
CkRestW_Dispose(rest);
return;
}
// Provide Azure Cloud credentials for the REST call.
azAuth = CkAuthAzureStorageW_Create();
CkAuthAzureStorageW_putAccessKey(azAuth,L"AZURE_ACCESS_KEY");
// The account name used here should match the 1st part of the domain passed in the call to Connect (above).
CkAuthAzureStorageW_putAccount(azAuth,L"chilkat");
CkAuthAzureStorageW_putScheme(azAuth,L"SharedKey");
CkAuthAzureStorageW_putService(azAuth,L"Blob");
// This causes the "x-ms-version: 2021-08-06" header to be automatically added.
CkAuthAzureStorageW_putXMsVersion(azAuth,L"2021-08-06");
success = CkRestW_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 = CkRestW_fullRequestNoBody(rest,L"GET",L"/mycontainer?restype=container&comp=list");
if (CkRestW_getLastMethodSuccess(rest) == FALSE) {
wprintf(L"%s\n",CkRestW_lastErrorText(rest));
CkRestW_Dispose(rest);
CkAuthAzureStorageW_Dispose(azAuth);
return;
}
// When successful, the Azure Storage service will respond with a 200 response status code,
// with an XML response body.
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));
CkRestW_Dispose(rest);
CkAuthAzureStorageW_Dispose(azAuth);
return;
}
// Load the XML response for parsing.
// An example of the response XML is shown below.
xml = CkXmlW_Create();
success = CkXmlW_LoadXml(xml,responseStr);
wprintf(L"%s\n",CkXmlW_getXml(xml));
// Let's iterate over the blobs...
lastMod = CkDateTimeW_Create();
numBlobs = CkXmlW_NumChildrenAt(xml,L"Blobs");
i = 0;
dt = CkDtObjW_Create();
while (i < numBlobs) {
wprintf(L"---- Blob %d ----\n",i);
CkXmlW_putI(xml,i);
wprintf(L"Name: %s\n",CkXmlW_getChildContent(xml,L"Blobs|Blob[i]|Name"));
wprintf(L"Content-Length: %s\n",CkXmlW_getChildContent(xml,L"Blobs|Blob[i]|Properties|Content-Length"));
wprintf(L"Content-Type: %s\n",CkXmlW_getChildContent(xml,L"Blobs|Blob[i]|Properties|Content-Type"));
wprintf(L"Content-MD5: %s\n",CkXmlW_getChildContent(xml,L"Blobs|Blob[i]|Properties|Content-MD5"));
wprintf(L"BlobType: %s\n",CkXmlW_getChildContent(xml,L"Blobs|Blob[i]|Properties|BlobType"));
wprintf(L"LeaseStatus: %s\n",CkXmlW_getChildContent(xml,L"Blobs|Blob[i]|Properties|LeaseStatus"));
CkDateTimeW_SetFromRfc822(lastMod,CkXmlW_getChildContent(xml,L"Blobs|Blob[i]|Properties|Last-Modified"));
CkDateTimeW_ToDtObj(lastMod,TRUE,dt);
wprintf(L"Last-Modified YMD: %d,%d,%d\n",CkDtObjW_getYear(dt),CkDtObjW_getMonth(dt),CkDtObjW_getDay(dt));
i = i + 1;
}
wprintf(L"-------------------------\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 = CkXmlW_chilkatPath(xml,L"/C/Name,helloWorld.txt|..|Properties|Last-Modified|*");
wprintf(L"helloWorld.txt Last-Modified: %s\n",lastModStr);
wprintf(L"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>
//
CkRestW_Dispose(rest);
CkAuthAzureStorageW_Dispose(azAuth);
CkXmlW_Dispose(xml);
CkDateTimeW_Dispose(lastMod);
CkDtObjW_Dispose(dt);
}