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(VBScript) Amazon S3 List More than 1000 Objects in BucketSee more Amazon S3 ExamplesS3 limits the size of the "List Objects" response to 1000 objects. To retrieve a listing of all of the objects in a bucket containing more than 1000 objects, we'll need to send several requests using continuation tokens.
Dim fso, outFile Set fso = CreateObject("Scripting.FileSystemObject") 'Create a Unicode (utf-16) output text file. Set outFile = fso.CreateTextFile("output.txt", True, True) ' This example assumes the Chilkat HTTP API to have been previously unlocked. ' See Global Unlock Sample for sample code. ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Http") set http = CreateObject("Chilkat.Http") ' Insert your access key here: http.AwsAccessKey = "AWS_ACCESS_KEY" ' Insert your secret key here: http.AwsSecretKey = "AWS_SECRET_KEY" ' For the example, we'll get a listing containing approx. 25 objects ' using continuation tokens with an artificially low max-keys set to 5. ' (You may omit the max-keys query parameter to get the default 1000 maximum ' number of keys per request.) ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder") set sbContinuationToken = CreateObject("Chilkat.StringBuilder") bGetMore = 1 ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder") set sbUri = CreateObject("Chilkat.StringBuilder") ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Xml") set xml = CreateObject("Chilkat.Xml") ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.CkDateTime") set dt = CreateObject("Chilkat.CkDateTime") Do While bGetMore = 1 ' Make sure to set the "list-type" query param equal to "2". ' This chooses the GET Bucket (List Objects) Version 2 of the method. ' IMPORTANT: You must include the max-keys param to get a response with a continuation token. ' S3 limits the number of objects in a single response to 1000. Therefore, your max-keys ' can be up to 1000. If, for example, you have 2000 objects and do not specify ' max-keys, then the response will contain 1000 objects with no continuation token. success = sbUri.SetString("chilkat100?list-type=2&max-keys=5") If (sbContinuationToken.Length > 0) Then success = sbUri.Append("&continuation-token=") success = sbUri.Append(sbContinuationToken.GetEncoded("url","utf-8")) End If strXml = http.S3_ListBucketObjects(sbUri.GetAsString()) If (http.LastMethodSuccess <> 1) Then outFile.WriteLine(http.LastErrorText) WScript.Quit End If outFile.WriteLine("Response status code = " & http.LastStatus) success = xml.LoadXml(strXml) If (success <> 1) Then outFile.WriteLine(xml.LastErrorText) WScript.Quit End If ' If the response status code was not 200, then the XML response is not a ' listing of objects, but instead contains error information. If (http.LastStatus <> 200) Then outFile.WriteLine(xml.GetXml()) outFile.WriteLine("Failed.") WScript.Quit End If ' If this is not the final response, then we'll get an XML response that begins ' like this. (The IsTruncated child will be "true", and the NextContinuationToken ' will have a value to be used in the next request.) ' <?xml version="1.0" encoding="UTF-8" ?> ' <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> ' <Name>chilkat100</Name> ' <Prefix /> ' <NextContinuationToken>1Mlcx+W9OKsr8cxp3DP6r71wgsTUMj0vqlntWoaJKNbYdrauLdf40LsUdBeSYGFhzbGIHdcf5DSLcEBWbqG+1fW1UcQkUW1V4qgQONAKOwb8y8vOLJAQ8iQ==</NextContinuationToken> ' <KeyCount>5</KeyCount> ' <MaxKeys>5</MaxKeys> ' <IsTruncated>true</IsTruncated> ' ' Iterate over the bucket items in this chunk get information for each.. numItems = xml.NumChildrenHavingTag("Contents") outFile.WriteLine("Number of bucket items = " & numItems) i = 0 Do While i < numItems xml.I = i itemKey = xml.GetChildContent("Contents[i]|Key") itemSizeDecimalStr = xml.GetChildContent("Contents[i]|Size") lastModTimestamp = xml.GetChildContent("Contents[i]|LastModified") success = dt.SetFromRfc822(lastModTimestamp) ' Get a local date/time. bLocal = 1 ' dtObj is a Chilkat.DtObj Set dtObj = dt.GetDtObj(bLocal) outFile.WriteLine(i & ": " & itemKey & ", " & itemSizeDecimalStr & ", " & dtObj.Day & "-" & dtObj.Month & "-" _ & dtObj.Year & ":" & dtObj.Hour & ":" & dtObj.Minute) i = i + 1 Loop ' Check IsTruncated. bGetMore = 0 If (xml.ChildContentMatches("IsTruncated","true",1) = 1) Then success = sbContinuationToken.SetString(xml.GetChildContent("NextContinuationToken")) If (sbContinuationToken.Length > 0) Then bGetMore = 1 End If End If Loop ' The output of this example (when tested) was: ' Response status code = 200 ' Number of bucket items = 5 ' 0: Abc.ics, 1833, 25-5-2011:9:53 ' 1: Corpse Bride film poster.jpg, 53481, 6-9-2016:13:32 ' 2: chiliPepper.gif, 7718, 12-3-2017:12:18 ' 3: chilkatdude.jpg, 35137, 20-5-2011:16:14 ' 4: cloud.search/dfe/indexer/pscc/2016/3/28/id,x-2-15-0-25-87-0.json, 1238, 2-4-2016:12:0 ' Response status code = 200 ' Number of bucket items = 5 ' 0: cloud.search/dfe/indexer/pscc/2016/3/28/idx-2-15-0-25-87-0.json, 1238, 2-4-2016:11:33 ' 1: dude.gif, 6373, 25-5-2011:17:29 ' 2: french.txt, 47, 12-3-2017:12:18 ' 3: hamlet.xml, 279658, 2-5-2016:12:21 ' 4: hamlet_play.xml, 279658, 20-3-2017:8:22 ' Response status code = 200 ' Number of bucket items = 5 ' 0: images/sea_creatures/starfish123.jpg, 6229, 19-1-2017:10:45 ' 1: images/sea_creatures/starfishåäö.jpg, 6229, 19-1-2017:12:7 ' 2: new folder/, 0, 26-11-2014:12:36 ' 3: new_starfish.jpg, 6229, 20-3-2017:8:22 ' 4: pigs.xml, 2804, 20-3-2017:8:22 ' Response status code = 200 ' Number of bucket items = 5 ' 0: somethingBig.zip, 13089458, 26-9-2016:9:29 ' 1: starfish.jpg, 6229, 12-3-2017:12:18 ' 2: starfish/, 0, 10-11-2014:10:7 ' 3: starfish/starfish.jpg, 6229, 10-11-2014:10:8 ' 4: starfish/starfish2.jpg, 6229, 19-11-2014:10:36 ' Response status code = 200 ' Number of bucket items = 5 ' 0: starfish/starfish3.jpg, 6229, 24-11-2014:14:33 ' 1: starfish2.jpg, 5987, 20-4-2012:12:6 ' 2: starfish3.jpg, 5987, 11-4-2012:7:10 ' 3: starfishA.jpg, 6229, 10-5-2016:8:44 ' 4: starfishCust.jpg, 6229, 12-11-2014:18:25 ' Response status code = 200 ' Number of bucket items = 1 ' 0: xyz.ics, 1833, 25-5-2011:8:52 ' ' outFile.Close |
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