What's wrong with this HTTP POST request?
Solution 1
It was the "Content-Length" property that was missing in the header and the server thought it was mandatory, which I suppose shouldn't be mandatory?
After adding the "Content-Length" to the header, works like a charm.
Solution 2
Based on your message, it should be a blank line before the body of the POST Request. Can you try adding one ?
As is, it is possible the server sees this request with no body and an header like :
{ "toaster:toaster" : value
which would explain the error.
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bigboy
Updated on September 18, 2022Comments
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bigboy over 1 year
I'm trying to fuzz a server using the Sulley fuzzing framework.
I observe the following stream in Wireshark. The error talks about a problem with JSON parsing, however, when I try the same HTTP POST request using Google Chrome's Postman extension, it succeeds.
Can anyone please explain what could be wrong about this HTTP POST request? The JSON seems valid.
POST /restconf/config HTTP/1.1 Host: 127.0.0.1:8080 Accept: */* Content-Type: application/yang.data+json { "toaster:toaster" : { "toaster:toasterManufacturer" : "Geqq", "toaster:toasterModelNumber" : "asaxc", "toaster:toasterStatus" : "_." }} HTTP/1.1 400 Bad Request Server: Apache-Coyote/1.1 Content-Type: */* Transfer-Encoding: chunked Date: Sat, 07 Jun 2014 05:26:35 GMT Connection: close 152 <?xml version="1.0" encoding="UTF-8" standalone="no"?> <errors xmlns="urn:ietf:params:xml:ns:yang:ietf-restconf"> <error> <error-type>protocol</error-type> <error-tag>malformed-message</error-tag> <error-message>Error parsing input: Root element of Json has to be Object</error-message> </error> </errors> 0
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bigboy almost 10 yearsNope. Tried changing the "Content-Type" to "application/json". Still the same error.
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bigboy almost 10 yearsStill doesn't work. :(
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Barmar almost 10 yearsRFC 2616 section 4.4 says If a request contains a message-body and a Content-Length is not given, the server SHOULD respond with 400 (bad request) if it cannot determine the length of the message