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saidshow's avatar
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Jul 24, 2019

API Calls to F5 limited to 1024 KB download


I am interacting with the F5 API in order to download ASM policies for the purpose of automating the backups. The process works fine however policies larger than 1024 KB are cut off at this size of 1024 KB. Initially I suspected that there was a default limit on the curl request however I have not been able to find information on how to increase this with the curl request.

Is this a limitation on the F5 API or the Curl request? wget is not an option as this is not natively supported on the F5 virtual appliance. My script lives on the appliance, downloads the relevant policies and then pushes them to a SMB share. The only issue is that the ASM policies that are larger than 1024 KB are being cut off at 1024 KB.

The API calls are as per the documentation here:


GET https://x.x.x.x/mgmt/tm/asm/policies

POST https://x.x.x.x/mgmt/tm/asm/tasks/export-policy

GET https://x.x.x.x/mgmt/tm/asm/file-transfer/downloads/$asmPolicy

Excluding the processing in my script the API calls I make are shown below: I expect the issue resides in the download api call. Is there a switch I can add to increase this limit?

curl -ku 'username:password' -X GET https://x.x.x.x/mgmt/tm/asm/policies | jq '.items[] | "pol_name:" + .name + ";api_id:" + .id' >> $wdir/asmDetails.txt
curl -ku 'username:password' -X POST https://x.x.x.x/mgmt/tm/asm/tasks/export-policy -H 'Content-Type: application/json' -d '{"filename":"'$asmPolicy'","policyReference":{"link":"https://localhost/mgmt/tm/asm/policies/'$asmIDs'"}}'
curl -ku 'username:password' -X GET https://x.x.x.x/mgmt/tm/asm/file-transfer/downloads/$asmPolicy > $wdir/asmBackup/"$folderName"/$number-$asmPolicy-$hostname-"$dateStamp".xml


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