src/nimhttpd.nim
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import
asynchttpserver,
asyncdispatch,
nativesockets,
os, strutils,
mimetypes,
times,
parseopt,
uri,
times
from httpcore import HttpMethod, HttpHeaders
import
nimhttpdpkg/config
const
name = pkgTitle
version = pkgVersion
style = "style.css".slurp
description = pkgDescription
author = pkgAuthor
addressDefault = "0.0.0.0"
portDefault = 1337
let usage = """ $1 v$2 - $3
(c) 2014-2021 $4
Usage:
nimhttpd [-p:port] [directory]
Arguments:
directory The directory to serve (default: current directory).
Options:
-t, --title The title to use in index pages (default: Index)
-p, --port The port to listen to (default: $5).
-a, --address The address to listen to (default: $6). If the specified port is
unavailable, the number will be incremented until an available port is found.
""" % [name, version, description, author, $portDefault, addressDefault]
type
NimHttpResponse* = tuple[
code: HttpCode,
content: string,
headers: HttpHeaders]
NimHttpSettings* = object
logging*: bool
directory*: string
mimes*: MimeDb
port*: Port
title*: string
address*: string
name*: string
version*: string
proc bindAvailablePort*(handle: SocketHandle, p: int): Port =
var check = -1
var port = p - 1
while check < 0'i32:
port += 1
var name: Sockaddr_in
name.sin_family = typeof(name.sin_family)(toInt(AF_INET))
name.sin_port = htons(uint16(port))
name.sin_addr.s_addr = htonl(INADDR_ANY)
check = bindAddr(handle, cast[ptr SockAddr](addr(name)), sizeof(name).Socklen)
result = getLocalAddr(handle, AF_INET)[1]
proc h_page(settings:NimHttpSettings, content, title, subtitle: string): string =
var footer = """<div id="footer">$1 v$2</div>""" % [settings.name, settings.version]
var titles = ""
result = """
<!DOCTYPE html>
<html>
<head>
<title>$1</title>
<style type="text/css">$2</style>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<h1>$1</h1>
<h2>$3</h2>
$4
$5
</body>
</html>
""" % [title, style, subtitle, content, footer]
proc relativePath(path, cwd: string): string =
var path2 = path
if cwd == "/":
return path
else:
path2.delete(0, cwd.len-1)
var relpath = path2.replace("\\", "/")
if (not relpath.endsWith("/")) and (not path.fileExists):
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, "Page Not Found"), 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, "Not Implemented"), headers: newHttpHeaders())
proc sendStaticFile(settings: NimHttpSettings, path: string): NimHttpResponse =
let mimes = settings.mimes
var ext = path.splitFile.ext
if ext == "":
ext = ".txt"
ext = ext[1 .. ^1]
let mimetype = mimes.getMimetype(ext.toLowerAscii)
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 = settings.title
let subtitle = 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.dirExists:
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, subtitle), headers: newHttpHeaders())
return res
proc printReqInfo(settings: NimHttpSettings, req: Request) =
if not settings.logging:
return
echo getTime().local, " - ", req.hostname, " ", req.reqMethod, " ", req.url.path
proc handleCtrlC() {.noconv.} =
echo "\nExiting..."
quit()
setControlCHook(handleCtrlC)
proc genMsg(settings: NimHttpSettings): string =
let url = "http://$1:$2/" % [settings.address, $settings.port.int]
let t = now()
let pid = getCurrentProcessId()
result = """$1 v$2
Address: $3
Directory: $4
Current Time: $5
PID: $6""" % [settings.name, settings.version, url, settings.directory.quoteShell, $t, $pid]
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", " ").decodeUrl()
var res: NimHttpResponse
if req.reqMethod != HttpGet:
res = sendNotImplemented(settings, path)
elif path.dirExists:
res = sendDirContents(settings, path)
elif path.fileExists:
res = sendStaticFile(settings, path)
else:
res = sendNotFound(settings, path)
await req.respond(res.code, res.content, res.headers)
echo genMsg(settings)
asyncCheck server.serve(settings.port, handleHttpRequest, settings.address)
when isMainModule:
var port = portDefault
var address = addressDefault
var logging = false
var www = getCurrentDir()
var title = "Index"
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 version
quit(0)
of "address", "a":
address = val
of "title", "t":
title = val
of "port", "p":
try:
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.dirExists:
www = expandFilename dir
else:
echo "Error: Directory '"&dir&"' does not exist."
quit(1)
else:
discard
let socket = createAsyncNativeSocket()
let availablePort = bindAvailablePort(socket.SocketHandle, port)
socket.closeSocket()
var settings: NimHttpSettings
settings.directory = www
settings.logging = logging
settings.mimes = newMimeTypes()
settings.mimes.register("htm", "text/html")
settings.address = address
settings.name = name
settings.title = title
settings.version = version
settings.port = availablePort
serve(settings)
runForever()
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