C
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 C Downloads
#include <C_CkRest.h>
#include <C_CkAuthAzureStorage.h>
#include <C_CkXml.h>
#include <C_CkDateTime.h>
#include <C_CkDtObj.h>
void ChilkatSample(void)
{
BOOL success;
HCkRest rest;
BOOL bTls;
int port;
BOOL bAutoReconnect;
HCkAuthAzureStorage azAuth;
const char *responseStr;
HCkXml xml;
HCkDateTime lastMod;
int numBlobs;
int i;
HCkDtObj dt;
const char *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 = 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 == FALSE) {
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: 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.
// 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) == FALSE) {
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;
dt = CkDtObj_Create();
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"));
CkDateTime_ToDtObj(lastMod,TRUE,dt);
printf("Last-Modified YMD: %d,%d,%d\n",CkDtObj_getYear(dt),CkDtObj_getMonth(dt),CkDtObj_getDay(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);
CkDtObj_Dispose(dt);
}