diff options
| author | Henrique Dias <mrhdias@gmail.com> | 2020-02-07 08:59:28 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-02-07 03:59:28 -0500 |
| commit | abd660c407d00d0c4f2129ff11bfc69badda8ece (patch) | |
| tree | 30299cf805479198b1fb5159689fceeb4d74eb44 | |
| parent | bf3f1c3762fba1c351ac294d40ceb633768e9d8c (diff) | |
| download | Nim-abd660c407d00d0c4f2129ff11bfc69badda8ece.tar.gz | |
Added a basic example how to handle a Post request. (#13339)
* Added a basic example how to handle a Post request. They were also made minor cosmetic changes. * Minor fixes suggested by Yardanico * Fixed a wrong value in chunkSize constant. * Re-added the request.body for compatibility!
| -rw-r--r-- | lib/pure/asynchttpserver.nim | 58 |
1 files changed, 55 insertions, 3 deletions
diff --git a/lib/pure/asynchttpserver.nim b/lib/pure/asynchttpserver.nim index 2754b128b..5292ac75a 100644 --- a/lib/pure/asynchttpserver.nim +++ b/lib/pure/asynchttpserver.nim @@ -29,6 +29,54 @@ ## await req.respond(Http200, "Hello World") ## ## waitFor server.serve(Port(8080), cb) +## +## Basic Post request handle +## ========================= +## +## This example will create an HTTP server on port 8080. The server will +## respond with a page with the actual and expected body length after +## submitting a file. +## +## .. code-block::nim +## import asynchttpserver, asyncdispatch +## import strutils, strformat +## +## proc htmlpage(contentLength, bodyLength: int): string = +## return &""" +## <!Doctype html> +## <html lang="en"> +## <head> +## <meta charset="utf-8"/> +## </head> +## <body> +## <form action="/" method="post" enctype="multipart/form-data"> +## File: <input type="file" name="testfile" accept="text/*"><br /> +## <input style="margin:10px 0;" type="submit"> +## </form><br /> +## Expected Body Length: {contentLength} bytes<br /> +## Actual Body Length: {bodyLength} bytes +## </body> +## </html> +## """ +## +## proc cb(req: Request) {.async.} = +## var +## contentLength = 0 +## bodyLength = 0 +## if req.reqMethod == HttpPost: +## contentLength = req.headers["Content-length"].parseInt +## if contentLength < 8*1024: # the default chunkSize +## # read the request body at once +## let body = await req.bodyStream.readAll(); +## bodyLength = body.len +## else: +## # read 8*1024 bytes at a time +## while (let data = await req.bodyStream.read(); data[0]): +## bodyLength += data[1].len +## await req.respond(Http200, htmlpage(contentLength, bodyLength)) +## +## let server = newAsyncHttpServer(maxBody = 10485760) # 10 MB +## waitFor server.serve(Port(8080), cb) import tables, asyncnet, asyncdispatch, parseutils, uri, strutils import httpcore @@ -46,7 +94,7 @@ const when (NimMajor, NimMinor) >= (1, 1): const - chunkSize = 8*1048 ## This seems perfectly reasonable for default chunkSize. + chunkSize = 8*1024 ## This seems perfectly reasonable for default chunkSize. type Request* = object @@ -56,7 +104,7 @@ when (NimMajor, NimMinor) >= (1, 1): protocol*: tuple[orig: string, major, minor: int] url*: Uri hostname*: string ## The hostname of the client that made the request. - body*: string + body*: string # For future removal bodyStream*: FutureStream[string] else: type @@ -162,12 +210,16 @@ proc processRequest( # Header: val # \n request.headers.clear() - request.body = "" request.hostname.shallowCopy(address) assert client != nil request.client = client when (NimMajor, NimMinor) >= (1, 1): request.bodyStream = newFutureStream[string]() + # To uncomment in the future after compatibility issues + # with third parties are solved + # else: + # request.body = "" + request.body = "" # Temporary fix for future removal # We should skip at least one empty line before the request # https://tools.ietf.org/html/rfc7230#section-3.5 |