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(C) Backblaze S3 List Bucket ObjectsSee more Backblaze S3 ExamplesDemonstrates how to list the objects in a bucket. The Chilkat S3 functions in the HTTP class are compatible with the Backblaze service. However, because of some specific issues, Chilkat v9.5.0.89 or later is needed.
#include <C_CkHttp.h> #include <C_CkXml.h> void ChilkatSample(void) { HCkHttp http; const char *bucketName; const char *strXml; HCkXml xml; BOOL success; const char *ETag; const char *Key; const char *LastModified; const char *ID; const char *SizeDecimalStr; const char *StorageClass; const char *ListBucketResult_xmlns; int i; int count_i; const char *IsTruncated; int MaxKeys; const char *Name; // This example assumes the Chilkat HTTP API to have been previously unlocked. // See Global Unlock Sample for sample code. http = CkHttp_Create(); // keyID = Access Key ID or Access Key CkHttp_putAwsAccessKey(http,"access-key"); // applicationKey = Secret Access Key or Secret Key CkHttp_putAwsSecretKey(http,"secret-key"); // Region is the 2nd part of your S3 Endpoint CkHttp_putAwsEndpoint(http,"s3.us-west-002.backblazeb2.com"); bucketName = "chilkat-test"; strXml = CkHttp_s3_ListBucketObjects(http,bucketName); if (CkHttp_getLastMethodSuccess(http) != TRUE) { printf("%s\n",CkHttp_lastErrorText(http)); CkHttp_Dispose(http); return; } printf("Response status code = %d\n",CkHttp_getLastStatus(http)); xml = CkXml_Create(); success = CkXml_LoadXml(xml,strXml); if (success != TRUE) { printf("%s\n",CkXml_lastErrorText(xml)); CkHttp_Dispose(http); CkXml_Dispose(xml); return; } // If the response status code was not 200, then the XML response is not a // listing of objects, but instead contains error information. if (CkHttp_getLastStatus(http) != 200) { printf("%s\n",CkXml_getXml(xml)); printf("Failed.\n"); CkHttp_Dispose(http); CkXml_Dispose(xml); return; } // A sample response is shown below. printf("%s\n",CkXml_getXml(xml)); printf("----\n"); // Use this online tool to generate parsing code from sample XML: // Generate Parsing Code from XML // <?xml version="1.0" encoding="UTF-8" standalone="yes"?> // <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> // <Contents> // <ETag>"303fb46cf341094fef6274b7789cd6aa"</ETag> // <Key>orchard.json</Key> // <LastModified>2021-10-30T14:45:52.000Z</LastModified> // <Owner> // <ID>f2ebbc5f792c</ID> // <DisplayName/> // </Owner> // <Size>22</Size> // <StorageClass>STANDARD</StorageClass> // </Contents> // <Contents> // <ETag>"a8551f0a5437f43a796fca7623ee9232"</ETag> // <Key>seahorse.jpg</Key> // <LastModified>2021-10-30T14:38:53.000Z</LastModified> // <Owner> // <ID>f2ebbc5f792c</ID> // <DisplayName/> // </Owner> // <Size>24388</Size> // <StorageClass>STANDARD</StorageClass> // </Contents> // <IsTruncated>false</IsTruncated> // <MaxKeys>1000</MaxKeys> // <Name>chilkat-test</Name> // <Prefix/> // <Marker/> // </ListBucketResult> ListBucketResult_xmlns = CkXml_getAttrValue(xml,"xmlns"); i = 0; count_i = CkXml_NumChildrenHavingTag(xml,"Contents"); while (i < count_i) { CkXml_putI(xml,i); ETag = CkXml_getChildContent(xml,"Contents[i]|ETag"); Key = CkXml_getChildContent(xml,"Contents[i]|Key"); LastModified = CkXml_getChildContent(xml,"Contents[i]|LastModified"); ID = CkXml_getChildContent(xml,"Contents[i]|Owner|ID"); SizeDecimalStr = CkXml_getChildContent(xml,"Contents[i]|Size"); StorageClass = CkXml_getChildContent(xml,"Contents[i]|StorageClass"); i = i + 1; } IsTruncated = CkXml_getChildContent(xml,"IsTruncated"); MaxKeys = CkXml_GetChildIntValue(xml,"MaxKeys"); Name = CkXml_getChildContent(xml,"Name"); CkHttp_Dispose(http); CkXml_Dispose(xml); } |
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