[vinayK34]

Fixes #1965.

Root Cause

The issue was in the parse_prefixed_json function in httpie/output/utils.py. The function was using re.findall(PREFIX_REGEX, data) to find all potential prefixes, then taking the first match without considering whether it started at position 0.

Problem Analysis

For the input '{{\"a\": 1}':

1. PREFIX_REGEX is [^{\\[\"]+ which matches sequences of characters that are NOT {, [, or \"
2. re.findall finds ALL matches including 'a' at position 3 (not position 0)
3. The code took the first match 'a' and treated it as a prefix
4. This resulted in returning prefix 'a' and body '{\"a\": 1}' instead of recognizing that there's no valid prefix

Fix Applied

Changed the parse_prefixed_json function to only consider matches that start at position 0:

Before:

matches = re.findall(PREFIX_REGEX, data)
data_prefix = matches[0] if matches else ''

After:

# Find matches that start at the beginning of the string
matches = []
for match in re.finditer(PREFIX_REGEX, data):
    if match.start() == 0:
        matches.append(match.group())
    else:
        break

data_prefix = matches[0] if matches else ''

Result

• Input '{{\"a\": 1}' now correctly returns prefix '' and body '{{\"a\": 1}'
• Valid prefixes like 'while(1);' in 'while(1);{\"a\": 1}' still work correctly
• Normal JSON input like '{\"a\": 1}' continues to work as expected

Tests

on fixed/: 3 passed in 0.06s; on orig/: 1 failed, 2 passed in 0.06s

PASS

Test 1: Main issue case

Command: sh /sandbox/.openclaw/workspace/team/bin/py.sh 1965 orig -c "from httpie.output.utils import load_prefixed_json; print(load_prefixed_json('{{\\\"a\\\": 1}'))"
Expected: ('a', JsonDictPreservingDuplicateKeys([('a', 1)])) (buggy behavior)
Actual: ('a', JsonDictPreservingDuplicateKeys([('a', 1)]))

Command: sh /sandbox/.openclaw/workspace/team/bin/py.sh 1965 fixed -c "from httpie.output.utils import load_prefixed_json; print(load_prefixed_json('{{\\\"a\\\": 1}'))"
Expected: ValueError: Invalid JSON (correct behavior)
Actual: ValueError: Invalid JSON

Test 2: Valid prefix case

Command: sh /sandbox/.openclaw/workspace/team/bin/py.sh 1965 orig -c "from httpie.output.utils import load_prefixed_json; print(load_prefixed_json('while(1);{\\\"a\\\": 1}'))"
Expected: ('while(1);', JsonDictPreservingDuplicateKeys([('a', 1)]))
Actual: ('while(1);', JsonDictPreservingDuplicateKeys([('a', 1)]))

Command: sh /sandbox/.openclaw/workspace/team/bin/py.sh 1965 fixed -c "from httpie.output.utils import load_prefixed_json; print(load_prefixed_json('while(1);{\\\"a\\\": 1}'))"
Expected: ('while(1);', JsonDictPreservingDuplicateKeys([('a', 1)]))
Actual: ('while(1);', JsonDictPreservingDuplicateKeys([('a', 1)]))

Test 3: Normal JSON case

Command: sh /sandbox/.openclaw/workspace/team/bin/py.sh 1965 orig -c "from httpie.output.utils import load_prefixed_json; print(load_prefixed_json('{\\\"a\\\": 1}'))"
Expected: ('', JsonDictPreservingDuplicateKeys([('a', 1)]))
Actual: ('', JsonDictPreservingDuplicateKeys([('a', 1)]))

Command: sh /sandbox/.openclaw/workspace/team/bin/py.sh 1965 fixed -c "from httpie.output.utils import load_prefixed_json; print(load_prefixed_json('{\\\"a\\\": 1}'))"
Expected: ('', JsonDictPreservingDuplicateKeys([('a', 1)]))
Actual: ('', JsonDictPreservingDuplicateKeys([('a', 1)]))