[GROOVY-7132] JsonSlurper throws exception if reader does not fill complete char buffer

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.3.7
• Fix Version/s: 2.3.8, 2.4.0-beta-4
• Component/s: JSON
• Flags: Patch
• Assignee: Cédric Champeau
• Reporter: Martin Schreier
• Created: 27/Oct/14 17:18
• Updated: 05/Apr/15 14:43
• Resolved: 05/Nov/14 05:42

Description

The method JsonSlurper.parse(Reader) throws the following exception:

groovy.json.JsonException: expecting '}' or ',' but got current char '' with an int value of 0

The current character read is '' with an int value of 0

if the reader does not always fill the complete char buffer at the method:

public int read(char[] cbuf, int off, int len) throws IOException

but returns a value < len on certain points.

I have provided a test case at
https://github.com/effrafax/jsonslurp

A standard use case where this exception occurs:
if you use a http-builder with JSON contentType where the server returns the response chunked (Transfer-Encoding: chunked). The InputStreamReader of the apache http client does not fill the complete char buffer at chunk borders.

Issue Links

• is duplicated by: GROOVY-7028 Chunked input stream incorrectly handled in IO.read()