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Request
Format: key=value or just flag.
Values are URL-encoded. Empty values are allowed.
Examples
Try:
/api/echo/123?flag=true&test=a%3Db
Router matches on path only; request parser exposes QueryParams and PathParams.
Path Param Test
Request Preview
Note: browsers add headers we can't read back (Host, User-Agent, etc.). This preview shows what our JS constructs.
Response
MP4 Test
Click to fetch and play the MP4 (served as Content-Length).
MP4 Test (chunked)
Click to fetch /video-chunked (Transfer-Encoding: chunked), assemble the bytes, then play.