Lianja
Lianja
Amazon S3 List More than 1000 Objects in Bucket
See more Amazon S3 Examples
S3 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.Chilkat Lianja Downloads
llSuccess = .F.
// This example assumes the Chilkat HTTP API to have been previously unlocked.
// See Global Unlock Sample for sample code.
loHttp = createobject("CkHttp")
// Insert your access key here:
loHttp.AwsAccessKey = "AWS_ACCESS_KEY"
// Insert your secret key here:
loHttp.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.)
loSbContinuationToken = createobject("CkStringBuilder")
llBGetMore = .T.
loSbUri = createobject("CkStringBuilder")
loXml = createobject("CkXml")
loDt = createobject("CkDateTime")
loDtObj = createobject("CkDtObj")
do while llBGetMore = .T.
// 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.
loSbUri.SetString("chilkat100?list-type=2&max-keys=5")
if (loSbContinuationToken.Length > 0) then
loSbUri.Append("&continuation-token=")
loSbUri.Append(loSbContinuationToken.GetEncoded("url","utf-8"))
endif
lcStrXml = loHttp.S3_ListBucketObjects(loSbUri.GetAsString())
if (loHttp.LastMethodSuccess = .F.) then
? loHttp.LastErrorText
release loHttp
release loSbContinuationToken
release loSbUri
release loXml
release loDt
release loDtObj
return
endif
? "Response status code = " + str(loHttp.LastStatus)
llSuccess = loXml.LoadXml(lcStrXml)
if (llSuccess = .F.) then
? loXml.LastErrorText
release loHttp
release loSbContinuationToken
release loSbUri
release loXml
release loDt
release loDtObj
return
endif
// If the response status code was not 200, then the XML response is not a
// listing of objects, but instead contains error information.
if (loHttp.LastStatus <> 200) then
? loXml.GetXml()
? "Failed."
release loHttp
release loSbContinuationToken
release loSbUri
release loXml
release loDt
release loDtObj
return
endif
// 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..
lnNumItems = loXml.NumChildrenHavingTag("Contents")
? "Number of bucket items = " + str(lnNumItems)
i = 0
do while i < lnNumItems
loXml.I = i
lcItemKey = loXml.GetChildContent("Contents[i]|Key")
lcItemSizeDecimalStr = loXml.GetChildContent("Contents[i]|Size")
lcLastModTimestamp = loXml.GetChildContent("Contents[i]|LastModified")
loDt.SetFromRfc822(lcLastModTimestamp)
// Get a local date/time.
llBLocal = .T.
loDt.ToDtObj(llBLocal,loDtObj)
? str(i) + ": " + lcItemKey + ", " + lcItemSizeDecimalStr + ", " + str(loDtObj.Day) + "-" + str(loDtObj.Month) + "-" + str(loDtObj.Year) + ":" + str(loDtObj.Hour) + ":" + str(loDtObj.Minute)
i = i + 1
enddo
// Check IsTruncated.
llBGetMore = .F.
if (loXml.ChildContentMatches("IsTruncated","true",.T.) = .T.) then
loSbContinuationToken.SetString(loXml.GetChildContent("NextContinuationToken"))
if (loSbContinuationToken.Length > 0) then
llBGetMore = .T.
endif
endif
enddo
// 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
//
//
release loHttp
release loSbContinuationToken
release loSbUri
release loXml
release loDt
release loDtObj