Go
Go
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 Go Downloads
success := false
// This example assumes the Chilkat HTTP API to have been previously unlocked.
// See Global Unlock Sample for sample code.
http := chilkat.NewHttp()
// Insert your access key here:
http.SetAwsAccessKey("AWS_ACCESS_KEY")
// Insert your secret key here:
http.SetAwsSecretKey("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.)
sbContinuationToken := chilkat.NewStringBuilder()
bGetMore := true
sbUri := chilkat.NewStringBuilder()
xml := chilkat.NewXml()
var itemKey *string = new(string)
var itemSizeDecimalStr *string = new(string)
var lastModTimestamp *string = new(string)
dt := chilkat.NewCkDateTime()
dtObj := chilkat.NewDtObj()
for bGetMore == true {
// 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.
sbUri.SetString("chilkat100?list-type=2&max-keys=5")
if sbContinuationToken.Length() > 0 {
sbUri.Append("&continuation-token=")
sbUri.Append(*sbContinuationToken.GetEncoded("url","utf-8"))
}
strXml := http.S3_ListBucketObjects(*sbUri.GetAsString())
if http.LastMethodSuccess() == false {
fmt.Println(http.LastErrorText())
http.DisposeHttp()
sbContinuationToken.DisposeStringBuilder()
sbUri.DisposeStringBuilder()
xml.DisposeXml()
dt.DisposeCkDateTime()
dtObj.DisposeDtObj()
return
}
fmt.Println("Response status code = ", http.LastStatus())
success = xml.LoadXml(*strXml)
if success == false {
fmt.Println(xml.LastErrorText())
http.DisposeHttp()
sbContinuationToken.DisposeStringBuilder()
sbUri.DisposeStringBuilder()
xml.DisposeXml()
dt.DisposeCkDateTime()
dtObj.DisposeDtObj()
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 http.LastStatus() != 200 {
fmt.Println(*xml.GetXml())
fmt.Println("Failed.")
http.DisposeHttp()
sbContinuationToken.DisposeStringBuilder()
sbUri.DisposeStringBuilder()
xml.DisposeXml()
dt.DisposeCkDateTime()
dtObj.DisposeDtObj()
return
}
// 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")
fmt.Println("Number of bucket items = ", numItems)
i := 0
for i < numItems {
xml.SetI(i)
itemKey = xml.GetChildContent("Contents[i]|Key")
itemSizeDecimalStr = xml.GetChildContent("Contents[i]|Size")
lastModTimestamp = xml.GetChildContent("Contents[i]|LastModified")
dt.SetFromRfc822(*lastModTimestamp)
// Get a local date/time.
bLocal := true
dt.ToDtObj(bLocal,dtObj)
fmt.Println(i, ": ", *itemKey, ", ", *itemSizeDecimalStr, ", ", dtObj.Day(), "-"
, dtObj.Month(), "-", dtObj.Year(), ":", dtObj.Hour(), ":", dtObj.Minute())
i = i + 1
}
// Check IsTruncated.
bGetMore = false
if xml.ChildContentMatches("IsTruncated","true",true) == true {
sbContinuationToken.SetString(*xml.GetChildContent("NextContinuationToken"))
if sbContinuationToken.Length() > 0 {
bGetMore = true
}
}
}
// 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
//
//
http.DisposeHttp()
sbContinuationToken.DisposeStringBuilder()
sbUri.DisposeStringBuilder()
xml.DisposeXml()
dt.DisposeCkDateTime()
dtObj.DisposeDtObj()