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() |