YAMLGuide
Fixing YAML Errors That Make No Sense Step by Step
A YAML debugging guide: the error catalog across three parsers, a worked session through five stacked mistakes, silent failures and tools to prevent them.
20 min read
Tag
error-fix
93 posts
JSON
JSON Parse Error Single Quotes Instead of Double Quotes
JSON needs double quotes, but a Python repr or JavaScript literal uses single quotes. What each parser says, why replacing quotes breaks, and safe fixes.
6 min read
XML
Invalid Character in XML and Stripping Control Characters
Fix PCDATA invalid Char value and reference to invalid character number: which characters XML 1.0 forbids, how to strip them from 28 MB in 0.03 s and verify.
6 min read
JSON
Unexpected End of JSON Input and How to Find the Cause
Unexpected end of JSON input means the text stopped too soon or was empty. Real messages for every cut point, and how to tell truncated from empty.
8 min read
XML
Premature End of Data in Tag and What Usually Caused It
Why XML fails with Premature end of data in tag: truncated downloads, cut gzip streams and empty responses, how each message differs, and what to check.
7 min read
JSON
Unexpected Token in JSON at Position 0 and What It Means
An unexpected token error at position 0 means the text is not JSON: usually an HTML error page, the word undefined or an unparsed object. How to tell which.
7 min read
XML
XML Parsing Error Not Well Formed and How to Find the Spot
Read the not well-formed error in ElementTree, lxml and xmllint on a 28.6 MB file: line and column, what the position means and a method to find the cause.
7 min read
JSONGuide
Fixing JSON Parse Errors by Reading the Message Properly
How to read a JSON parse error: what the position means in Python, Node, PHP and jq, twelve common causes, and a method that finds the bad byte fast.
18 min read
XMLGuide
Fixing XML Parse Errors Fast With a Triage Routine
A tested routine for XML that will not parse: check the bytes, then the encoding, then the characters, then the structure, with an error message dictionary.
19 min read