src/nimhttpd.nim
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import
asyncdispatch,
asynchttpserver,
mimetypes,
nativesockets,
os,
parseopt,
strutils,
times,
uri
from httpcore import HttpMethod, HttpHeaders, parseHeader
import
nimhttpdpkg/config
const
name = pkgTitle
version = pkgVersion
style = "style.css".slurp
description = pkgDescription
author = pkgAuthor
addressDefault4 = "127.0.0.1"
addressDefault6 = "0:0:0:0:0:0:0:1"
portDefault = 1337
let usage = """ $1 v$2 - $3
(c) 2014-2023 $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). If the specified port is
unavailable, the number will be incremented until an available port is found.
-a, --address The IPv4 address to listen to (default: $6).
-6, --ipv6 The IPv6 address to listen to (default: $7).
-H --header Add a custom header. Multiple headers can be added.
""" % [name, version, description, author, $portDefault, $addressDefault4, $addressDefault6]
type
NimHttpResponse* = tuple[
code: HttpCode,
content: string,
headers: HttpHeaders]
NimHttpSettings* = object
logging*: bool
directory*: string
mimes*: MimeDb
port*: Port
title*: string
address4*: string
address6*: string
name*: string
version*: string
headers*: HttpHeaders
proc hPage(settings:NimHttpSettings, content, title, subtitle: string): string =
var footer = """<div id="footer">$1 v$2</div>""" % [settings.name, settings.version]
result = """
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="$3">
<title>$1</title>
<style>$2</style>
</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: hPage(settings, content, $int(Http404), "Not Found"), headers: {"Content-Type": "text/html"}.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: hPage(settings, content, $int(Http501), "Not Implemented"), headers: {"Content-Type": "text/html"}.newHttpHeaders())
proc sendStaticFile(settings: NimHttpSettings, path: string): NimHttpResponse =
var
mimes = settings.mimes
ext = path.splitFile.ext
if ext == "": ext = ".txt" else: 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, dir: string): NimHttpResponse =
var
res: NimHttpResponse
cwd = settings.directory.absolutePath
files = newSeq[string](0)
path = dir.absolutePath
if not path.startsWith(cwd):
path = cwd
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: hPage(settings, ul, title, subtitle), headers: {"Content-Type": "text/html"}.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 t = now()
let pid = getCurrentProcessId()
result = """$1 v$2
Address (IPv4): http://$3:$5
Address (IPv6): http://$4:$5
Directory: $6
Current Time: $7
PID: $8""" % [settings.name, settings.version, settings.address4, settings.address6, $settings.port, 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
res.headers = settings.headers
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)
for key, value in settings.headers:
res.headers[key] = value
await req.respond(res.code, res.content, res.headers)
echo genMsg(settings)
asyncCheck server.serve(settings.port, handleHttpRequest, settings.address4, -1, AF_INET)
asyncCheck server.serve(settings.port, handleHttpRequest, settings.address6, -1, AF_INET6)
when isMainModule:
var port = portDefault
var address4 = addressDefault4
var address6 = addressDefault6
var logging = false
var www = getCurrentDir()
var title = "Index"
var headers = newHttpHeaders()
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":
address4 = val
of "ipv6", "6":
address6 = 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."
of "header", "H":
let (key, values) = parseHeader(val)
headers[key] = values
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
var addrInfo4 = getAddrInfo(address4, Port(port), AF_INET)
var addrInfo6 = getAddrInfo(address6, Port(port), AF_INET6)
if (addrInfo4 == nil) and (addrInfo6 == nil):
echo "Error: Could not resolve given IPv4 or IPv6 addresses."
quit(1)
freeAddrInfo(addrInfo4)
freeAddrInfo(addrInfo6)
var settings: NimHttpSettings
settings.directory = www
settings.logging = logging
settings.mimes = newMimeTypes()
settings.mimes.register("htm", "text/html")
settings.address4 = address4
settings.address6 = address6
settings.name = name
settings.title = title
settings.version = version
settings.port = Port(port)
settings.headers = headers
serve(settings)
runForever()
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