pingback url is right-trimmed incorrectly

[qdinar]

an url ending with %d0%b5%d1%81% was produced by pingback mechanism, that url is in pingback comment, and server returns for its request:
Bad Request
Your browser sent a request that this server could not understand.


but if it would end with %d1%81 it works. wordpress automatically fixes it. but also it does not open if it ends with %d1%8 or %d1 .

[dd32]

If i'm understanding this correctly, It sounds like that the comment_author_url field was too short for the long pingback URL provided (since the URL length was increased by encoded characters), and thus it was truncated, resulting in an invalid URL.

I'm closing as a duplicate of the more well explained #17771