src/litestorepkg/lib/server.nim
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import asynchttpserver, asyncdispatch, times, strutils, pegs, logger, cgi, os, json, tables, strtabs, base64, asyncnet, jwt import types, utils, api_v1, api_v2, api_v3, api_v4, api_v5, api_v6 export api_v5 proc decodeUrlSafeAsString*(s: string): string = var s = s.replace('-', '+').replace('_', '/') while s.len mod 4 > 0: s &= "=" base64.decode(s) proc decodeUrlSafe*(s: string): seq[byte] = cast[seq[byte]](decodeUrlSafeAsString(s)) proc getReqInfo(req: LSRequest): string = var url = req.url.path if req.url.anchor != "": url = url & "#" & req.url.anchor if req.url.query != "": url = url & "?" & req.url.query return req.hostname & " " & $req.reqMethod & " " & url proc handleCtrlC() {.noconv.} = echo "" LOG.info("Exiting...") quit() template auth(uri: string, jwt: JWT): void = let cfg = access[uri] if cfg.hasKey(reqMethod): LOG.debug("Authenticating: " & reqMethod & " " & uri) if not req.headers.hasKey("Authorization"): return resError(Http401, "Unauthorized - No token") let token = req.headers["Authorization"].replace(peg"^ 'Bearer '", "") # Validate token try: jwt = token.toJwt() let parts = token.split(".") var sig = LS.auth["signature"].getStr discard verifySignature(parts[0] & "." & parts[1], decodeUrlSafe(parts[2]), sig) verifyTimeClaims(jwt) let scopes = cfg[reqMethod] # Validate scope var authorized = "" let reqScopes = ($jwt.claims["scope"].node.str).split(peg"\s+") LOG.debug("Resource scopes: " & $scopes) LOG.debug("Request scopes: " & $reqScopes) for scope in scopes: for reqScope in reqScopes: if reqScope == scope.getStr: authorized = scope.getStr break if authorized == "": return resError(Http403, "Forbidden - You are not permitted to access this resource") LOG.debug("Authorization successful: " & authorized) except: echo getCurrentExceptionMsg() writeStackTrace() return resError(Http401, "Unauthorized - Invalid token") proc isAllowed(resource, id, meth: string): bool = if LS.config.kind != JObject or not LS.config.hasKey("resources"): return true var reqUri = "/" & resource & "/" & id if reqUri[^1] == '/': reqUri.removeSuffix({'/'}) let parts = reqUri.split("/") let ancestors = parts[1..parts.len-2] var currentPath = "" var currentPaths = "" for p in ancestors: currentPath &= "/" & p currentPaths = currentPath & "/*" echo currentPaths if LS.config["resources"].hasKey(currentPaths) and LS.config["resources"][currentPaths].hasKey(meth) and LS.config["resources"][currentPaths][meth].hasKey("allowed"): let allowed = LS.config["resources"][currentPaths][meth]["allowed"] if (allowed == %false): return false; if LS.config["resources"].hasKey(reqUri) and LS.config["resources"][reqUri].hasKey(meth) and LS.config["resources"][reqUri][meth].hasKey("allowed"): let allowed = LS.config["resources"][reqUri][meth]["allowed"] if (allowed == %false): return false return true proc processApiUrl(req: LSRequest, LS: LiteStore, info: ResourceInfo): LSResponse = var reqUri = "/" & info.resource & "/" & info.id if reqUri[^1] == '/': reqUri.removeSuffix({'/'}) let reqMethod = $req.reqMethod var jwt: JWT if not isAllowed(info.resource, info.id, reqMethod): return resError(Http405, "Method not allowed: $1" % reqMethod) # Authentication/Authorization if LS.auth != newJNull(): var uri = reqUri let access = LS.auth["access"] while true: # Match exact url if access.hasKey(uri): auth(uri, jwt) break # Match exact url adding /* (e.g. /docs would match also /docs/* in auth.json) elif uri[^1] != '*' and uri[^1] != '/': if access.hasKey(uri & "/*"): auth(uri & "/*", jwt) break var parts = uri.split("/") if parts[^1] == "*": discard parts.pop discard parts.pop if parts.len > 0: # Go up one level uri = parts.join("/") & "/*" else: # If at the end of the URL, check generic URL uri = "/*" if access.hasKey(uri): auth(uri, jwt) break if info.version == "v6": if info.resource.match(peg"^docs / info / tags / indexes$"): var nReq = req if jwt.signature.len != 0: nReq.jwt = jwt return api_v6.execute(nReq, LS, info.resource, info.id) elif info.resource.match(peg"^dir$"): if LS.directory.len > 0: return api_v6.serveFile(req, LS, info.id) else: return resError(Http400, "Bad Request - Not serving any directory." % info.version) else: return resError(Http404, "Resource Not Found: $1" % info.resource) elif info.version == "v5": if info.resource.match(peg"^docs / info / tags / indexes$"): return api_v5.route(req, LS, info.resource, info.id) elif info.resource.match(peg"^dir$"): if LS.directory.len > 0: return api_v5.serveFile(req, LS, info.id) else: return resError(Http400, "Bad Request - Not serving any directory." % info.version) else: return resError(Http404, "Resource Not Found: $1" % info.resource) elif info.version == "v4": if info.resource.match(peg"^docs / info / tags$"): return api_v4.route(req, LS, info.resource, info.id) elif info.resource.match(peg"^dir$"): if LS.directory.len > 0: return api_v4.serveFile(req, LS, info.id) else: return resError(Http400, "Bad Request - Not serving any directory." % info.version) else: return resError(Http404, "Resource Not Found: $1" % info.resource) elif info.version == "v3": if info.resource.match(peg"^docs / info$"): return api_v3.route(req, LS, info.resource, info.id) elif info.resource.match(peg"^dir$"): if LS.directory.len > 0: return api_v3.serveFile(req, LS, info.id) else: return resError(Http400, "Bad Request - Not serving any directory." % info.version) else: return resError(Http404, "Resource Not Found: $1" % info.resource) elif info.version == "v2": if info.resource.match(peg"^docs / info$"): return api_v2.route(req, LS, info.resource, info.id) elif info.resource.match(peg"^dir$"): if LS.directory.len > 0: return api_v2.serveFile(req, LS, info.id) else: return resError(Http400, "Bad Request - Not serving any directory." % info.version) else: return resError(Http404, "Resource Not Found: $1" % info.resource) elif info.version == "v1": if info.resource.match(peg"^docs / info$"): return api_v1.route(req, LS, info.resource, info.id) elif info.resource.match(peg"^dir$"): if LS.directory.len > 0: return api_v1.serveFile(req, LS, info.id) else: return resError(Http400, "Bad Request - Not serving any directory." % info.version) else: return resError(Http404, "Resource Not Found: $1" % info.resource) else: if info.version == "v1" or info.version == "v2" or info.version == "v3" or info.version == "v4" or info.version == "v5": return resError(Http400, "Bad Request - Invalid API version: $1" % info.version) else: if info.resource.decodeURL.strip == "": return resError(Http400, "Bad Request - No resource specified." % info.resource) else: return resError(Http404, "Resource Not Found: $1" % info.resource) proc process*(req: LSRequest, LS: LiteStore): LSResponse {.gcsafe.}= var matches = @["", "", ""] template route(req: LSRequest, peg: Peg, op: untyped): untyped = if req.url.path.find(peg, matches) != -1: op try: var info: ResourceInfo req.route peg"^\/?$": info.version = "v6" info.resource = "info" return req.processApiUrl(LS, info) req.route peg"^\/favicon.ico$": result.code = Http200 result.content = LS.favicon result.headers = ctHeader("image/x-icon") return result req.route PEG_DEFAULT_URL: info.version = "v6" info.resource = matches[0] info.id = matches[1] return req.processApiUrl(LS, info) req.route PEG_URL: info.version = matches[0] info.resource = matches[1] info.id = matches[2] return req.processApiUrl(LS, info) raise newException(EInvalidRequest, req.getReqInfo()) except EInvalidRequest: let e = (ref EInvalidRequest)(getCurrentException()) let trace = e.getStackTrace() return resError(Http404, "Resource Not Found: $1" % getCurrentExceptionMsg().split(" ")[2], trace) except: let e = getCurrentException() let trace = e.getStackTrace() return resError(Http500, "Internal Server Error: $1" % getCurrentExceptionMsg(), trace) setControlCHook(handleCtrlC) proc serve*(LS: LiteStore) = var server = newAsyncHttpServer() proc handleHttpRequest(origReq: Request): Future[void] {.async, gcsafe, closure.} = var client = origReq.client var req = newLSRequest(origReq) let address = client.getLocalAddr() req.url.hostname = address[0] req.url.port = $int(address[1]) LOG.info(getReqInfo(req).replace("$", "$$")) let res = req.process(LS) var newReq = newRequest(req, client) await newReq.respond(res.code, res.content, res.headers) echo(LS.appname & " v" & LS.appversion & " started on " & LS.address & ":" & $LS.port & ".") if LS.configFile != "": echo "- Configuration File: " & LS.configFile if LS.authFile != "": echo "- Auth File: " & LS.authFile if LS.mount: echo "- Mirroring datastore changes to: " & LS.directory if LS.readonly: echo "- Read-only mode" echo "- Log Level: " & LS.loglevel echo "- Store: " & LS.file if LS.auth != newJNull(): echo "- Authorization configured" asyncCheck server.serve(LS.port.Port, handleHttpRequest, LS.address) |