nimhttpd.nim
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import asynchttpserver, asyncdispatch, asyncnet, os, strutils, mimetypes, times, parseopt2
from httpcore import HttpMethod, HttpHeaders
const style = "style.css".slurp
let appname = "NimHTTPd Web Server"
let appversion = "1.0.2"
let usage = appname & " v" & appversion & " - Tiny Static File Web Server" & """
(c) 2014-2017 Fabio Cevasco
Usage:
nimhttpd [-p:port] [directory]
Arguments:
directory The directory to serve (default: current directory).
port Listen to port (default: 1337).
"""
type
NimHttpResponse* = tuple[
code: HttpCode,
content: string,
headers: HttpHeaders]
NimHttpSettings* = object
logging*: bool
directory*: string
mimes*: MimeDb
port*: Port
address*: string
appname: string
appversion*: string
proc h_page(settings:NimHttpSettings, content: string, title=""): string =
var footer = """<div id="footer">$1 v$2</div>""" % [settings.appname, settings.appversion]
result = """
<!DOCTYPE html>
<html>
<head>
<title>$1</title>
<style type="text/css">$2</style>
<meta charset="UTF-8">
</head>
<body>
<h1>$1</h1>
$3
$4
</body>
</html>
""" % [title, style, content, footer]
proc relativePath(path, cwd: string): string =
var path2 = path
if cwd == "/":
return path
else:
path2.delete(0, cwd.len)
var relpath = path2.replace("\\", "/")
if (not relpath.endsWith("/")) and (not path.existsFile):
relpath = relpath&"/"
if not relpath.startsWith("/"):
relpath = "/"&relpath
return relpath
proc relativeParent(path, cwd: string): string =
var relparent = path.parentDir.relativePath(cwd)
if relparent == "":
return "/"
else:
return relparent
proc sendNotFound(settings: NimHttpSettings, path: string): NimHttpResponse =
var content = "<p>The page you requested cannot be found.<p>"
return (code: Http404, content: h_page(settings, content, $Http404), headers: newHttpHeaders())
proc sendNotImplemented(settings: NimHttpSettings, path: string): NimHttpResponse =
var content = "<p>This server does not support the functionality required to fulfill the request.</p>"
return (code: Http501, content: h_page(settings, content, $Http501), headers: newHttpHeaders())
proc sendStaticFile(settings: NimHttpSettings, path: string): NimHttpResponse =
let mimes = settings.mimes
let mimetype = mimes.getMimetype(path.splitFile.ext[1 .. ^1])
var file = path.readFile
return (code: Http200, content: file, headers: {"Content-Type": mimetype}.newHttpHeaders)
proc sendDirContents(settings: NimHttpSettings, path: string): NimHttpResponse =
let cwd = settings.directory
var res: NimHttpResponse
var files = newSeq[string](0)
if path != cwd and path != cwd&"/" and path != cwd&"\\":
files.add """<li class="i-back entypo"><a href="$1">..</a></li>""" % [path.relativeParent(cwd)]
var title = "Index of " & path.relativePath(cwd)
for i in walkDir(path):
let name = i.path.extractFilename
let relpath = i.path.relativePath(cwd)
if name == "index.html" or name == "index.htm":
return sendStaticFile(settings, i.path)
if i.path.existsDir:
files.add """<li class="i-folder entypo"><a href="$1">$2</a></li>""" % [relpath, name]
else:
files.add """<li class="i-file entypo"><a href="$1">$2</a></li>""" % [relpath, name]
let ul = """
<ul>
$1
</ul>
""" % [files.join("\n")]
res = (code: Http200, content: h_page(settings, ul, title), headers: newHttpHeaders())
return res
proc printReqInfo(settings: NimHttpSettings, req: Request) =
if not settings.logging:
return
echo getLocalTime(getTime()), " - ", req.hostname, " ", req.reqMethod, " ", req.url.path
proc handleCtrlC() {.noconv.} =
echo "\nExiting..."
quit()
setControlCHook(handleCtrlC)
proc serve*(settings: NimHttpSettings) =
var server = newAsyncHttpServer()
proc handleHttpRequest(req: Request): Future[void] {.async.} =
printReqInfo(settings, req)
let path = settings.directory/req.url.path.replace("%20", " ")
var res: NimHttpResponse
if req.reqMethod != HttpGet:
res = sendNotImplemented(settings, path)
elif path.existsDir:
res = sendDirContents(settings, path)
elif path.existsFile:
res = sendStaticFile(settings, path)
else:
res = sendNotFound(settings, path)
await req.respond(res.code, res.content, res.headers)
echo settings.appname, " v", settings.appversion, " started on port ", int(settings.port), "."
echo "Serving directory ", settings.directory
asyncCheck server.serve(settings.port, handleHttpRequest, settings.address)
when isMainModule:
var port = Port(1337)
var address = ""
var logging = false
var www = getCurrentDir()
for kind, key, val in getopt():
case kind
of cmdLongOption, cmdShortOption:
case key
of "log", "l":
logging = true
of "help", "h":
echo usage
quit(0)
of "version", "v":
echo appversion
quit(0)
of "port", "p":
try:
port = Port(val.parseInt)
except:
if val == "":
echo "Port not set."
quit(2)
else:
echo "Error: Invalid port: '", val, "'"
echo "Running on default port instead."
else:
discard
of cmdArgument:
var dir: string
if key.isAbsolute:
dir = key
else:
dir = www/key
if dir.existsDir:
www = expandFilename dir
else:
echo "Error: Directory '"&dir&"' does not exist."
quit(1)
else:
discard
var settings: NimHttpSettings
settings.directory = www
settings.logging = logging
settings.mimes = newMimeTypes()
settings.address = address
settings.appname = appname
settings.appversion = appversion
settings.port = port
serve(settings)
runForever()
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