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Detect and handle Cloudflare error responses

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Fixes #1434
This commit is contained in:
Zed 2026-08-19 06:28:53 +07:00
commit 0bc9702854
1 changed files with 18 additions and 0 deletions
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18
src/apiutils.nim
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@ -11,6 +11,20 @@ const
npCache = "x-np-cache"
errorsToSkip = {null, doesntExist, tweetNotFound, timeout, unauthorized, badRequest}
proc isCloudflareHtml*(body: string): bool =
## Detect Cloudflare HTML error pages returned instead of JSON
if body.len < 14 or body[0] != '<': return false
body[0 ..< 14].toLowerAscii() == "<!doctype html" and "Cloudflare" in body
proc cfTitle*(body: string): string =
## Extract <title> from Cloudflare HTML for log diagnostics
let start = body.find("<title>")
if start < 0: return "unknown"
let contentStart = start + 7
let stop = body.find("</title>", contentStart)
if stop < 0: return "unknown"
body[contentStart ..< stop].splitWhitespace().join(" ")
var
pool: HttpPool
disableTid: bool
@ -151,6 +165,10 @@ template fetchImpl(result, fetchBody) {.dirty.} =
if resp.headers.getOrDefault("content-encoding") == "gzip":
result = uncompress(result, dfGzip)
if isCloudflareHtml(result):
echo "[cloudflare] ", resp.status, " (", cfTitle(result), "), API: ", url.path, ", session: ", session.pretty
raise rateLimitError()
if result.startsWith("{\"errors"):
let errors = result.fromJson(Errors)
if errors notin errorsToSkip: