src/litestorepkg/lib/api_v8.nim
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import std/[asynchttpserver, httpclient, strutils, sequtils, cgi, strtabs, pegs, json, os, uri, tables, times] import types, contenttypes, core, utils, logger, duktape # Helper procs proc sqlOp(op: string): string = let table = newStringTable() table["not eq"] = "<>" table["eq"] = "==" table["gt"] = ">" table["gte"] = ">=" table["lt"] = "<" table["lte"] = "<=" table["contains"] = "contains" table["like"] = "like" return table[op] proc orderByClauses*(str: string): string = var clauses = newSeq[string]() var fragments = str.split(",") let clause = peg""" clause <- {[-+]} {field} field <- ('id' / 'created' / 'modified' / path) path <- '$' (objField)+ ident <- [a-zA-Z0-9_]+ objField <- '.' ident """ for f in fragments: var matches = @["", ""] if f.find(clause, matches) != -1: var field = matches[1] if field[0] == '$': field = "json_extract(documents.data, '$1')" % matches[1] if matches[0] == "-": clauses.add("$1 COLLATE NOCASE DESC" % field) else: clauses.add("$1 COLLATE NOCASE ASC" % field) return clauses.join(", ") proc selectClause*(str: string, options: var QueryOptions) = let tokens = """ path <- '$' (objItem / objField)+ ident <- [a-zA-Z0-9_]+ objIndex <- '[' \d+ ']' objField <- '.' ident objItem <- objField objIndex """ let fields = peg(""" fields <- ^{field} (\s* ',' \s* {field})*$ field <- path \s+ ('as' / 'AS') \s+ ident """ & tokens) let field = peg(""" field <- ^{path} \s+ ('as' / 'AS') \s+ {ident}$ """ & tokens) var fieldMatches = newSeq[string](10) if str.strip.match(fields, fieldMatches): for m in fieldMatches: if m.len > 0: var rawTuple = newSeq[string](2) if m.match(field, rawTuple): options.jsonSelect.add((path: rawTuple[0], alias: rawTuple[1])) proc filterClauses*(str: string, options: var QueryOptions) = let tokens = """ operator <- 'not eq' / 'eq' / 'gte' / 'gt' / 'lte' / 'lt' / 'contains' / 'like' value <- string / number / 'null' / 'true' / 'false' string <- '"' ('\\"' . / [^"])* '"' number <- '-'? '0' / [1-9] [0-9]* ('.' [0-9]+)? (( 'e' / 'E' ) ( '+' / '-' )? [0-9]+)? path <- '$' (objItem / objField)+ ident <- [a-zA-Z0-9_]+ objIndex <- '[' \d+ ']' objField <- '.' ident objItem <- objField objIndex """ let clause = peg(""" clause <- {path} \s+ {operator} \s+ {value} """ & tokens) let andClauses = peg(""" andClauses <- ^{clause} (\s+ 'and' \s+ {clause})*$ clause <- path \s+ operator \s+ value """ & tokens) let orClauses = peg(""" orClauses <- ^{andClauses} (\s+ 'or' \s+ {andClauses})*$ andClauses <- clause (\s+ 'and' \s+ clause)* clause <- path \s+ operator \s+ value """ & tokens) var orClausesMatches = newSeq[string](10) discard str.strip.match(orClauses, orClausesMatches) var parsedClauses = newSeq[seq[seq[string]]]() for orClause in orClausesMatches: if orClause.len > 0: var andClausesMatches = newSeq[string](10) discard orClause.strip.match(andClauses, andClausesMatches) var parsedAndClauses = newSeq[seq[string]]() for andClause in andClausesMatches: if andClause.len > 0: var clauses = newSeq[string](3) discard andClause.strip.match(clause, clauses) clauses[1] = sqlOp(clauses[1]) if clauses[2] == "true": clauses[2] = "1" elif clauses[2] == "false": clauses[2] = "0" parsedAndClauses.add clauses if parsedAndClauses.len > 0: parsedClauses.add parsedAndClauses if parsedClauses.len == 0: return var currentArr = 0 var tables = newSeq[string]() let resOrClauses = parsedClauses.map do (it: seq[seq[string]]) -> string: let resAndClauses = it.map do (x: seq[string]) -> string: if x[1] == "contains": currentArr = currentArr + 1 tables.add "json_each(documents.data, '$1') AS arr$2" % [x[0], $currentArr] return "arr$1.value == $2" % [$currentArr, x[2]] else: var arr = @[x[0], x[1], x[2]] if x[1] == "like": arr[2] = x[2].replace('*', '%') return "json_extract(documents.data, '$1') $2 $3 " % arr return resAndClauses.join(" AND ") options.tables = options.tables & tables options.jsonFilter = resOrClauses.join(" OR ") proc parseQueryOption*(fragment: string, options: var QueryOptions) = if fragment == "": return var pair = fragment.split('=') if pair.len < 2 or pair[1] == "": raise newException(EInvalidRequest, "Invalid query string fragment '$1'" % fragment) try: pair[1] = pair[1].replace("+", "%2B").decodeURL except CatchableError: raise newException(EInvalidRequest, "Unable to decode query string fragment '$1'" % fragment) case pair[0]: of "filter": filterClauses(pair[1], options) if options.jsonFilter == "": raise newException(EInvalidRequest, "Invalid filter clause: $1" % pair[ 1].replace("\"", "\\\"")) of "select": selectClause(pair[1], options) if options.jsonSelect.len == 0: raise newException(EInvalidRequest, "Invalid select clause: $1" % pair[ 1].replace("\"", "\\\"")) of "like": options.like = pair[1] of "search": options.search = pair[1] of "tags": options.tags = pair[1] of "created-after": try: options.createdAfter = pair[1].parseInt.fromUnix.utc.format("yyyy-MM-dd'T'HH:mm:ss'Z'") except CatchableError: raise newException(EInvalidRequest, "Invalid created-after value: $1" % getCurrentExceptionMsg()) of "created-before": try: options.createdBefore = pair[1].parseInt.fromUnix.utc.format("yyyy-MM-dd'T'HH:mm:ss'Z'") except CatchableError: raise newException(EInvalidRequest, "Invalid created-before value: $1" % getCurrentExceptionMsg()) of "modified-after": try: options.modifiedAfter = pair[1].parseInt.fromUnix.utc.format("yyyy-MM-dd'T'HH:mm:ss'Z'") except CatchableError: raise newException(EInvalidRequest, "Invalid modified.after value: $1" % getCurrentExceptionMsg()) of "modified-before": try: options.modifiedBefore = pair[1].parseInt.fromUnix.utc.format("yyyy-MM-dd'T'HH:mm:ss'Z'") except CatchableError: raise newException(EInvalidRequest, "Invalid modified-before value: $1" % getCurrentExceptionMsg()) of "limit": try: options.limit = pair[1].parseInt except CatchableError: raise newException(EInvalidRequest, "Invalid limit value: $1" % getCurrentExceptionMsg()) of "offset": try: options.offset = pair[1].parseInt except CatchableError: raise newException(EInvalidRequest, "Invalid offset value: $1" % getCurrentExceptionMsg()) of "sort": let orderby = pair[1].orderByClauses() if orderby != "": options.orderby = orderby else: raise newException(EInvalidRequest, "Invalid sort value: $1" % pair[1]) of "contents", "raw": discard else: discard proc parseQueryOptions*(querystring: string, options: var QueryOptions) = var q = querystring if q.startsWith("?"): q = q[1 .. q.len - 1] var fragments = q.split('&') for f in fragments: f.parseQueryOption(options) proc validate*(req: LSRequest, LS: LiteStore, resource: string, id: string, cb: proc(req: LSRequest, LS: LiteStore, resource: string, id: string): LSResponse): LSResponse = if req.reqMethod == HttpPost or req.reqMethod == HttpPut or req.reqMethod == HttpPatch: var ct = "" let body = req.body.strip if body == "": return resError(Http400, "Bad request: No content specified for document.") if req.headers.hasKey("Content-Type"): ct = req.headers["Content-Type"] case ct: of "application/json": try: discard body.parseJson() except CatchableError: return resError(Http400, "Invalid JSON content - $1" % getCurrentExceptionMsg()) else: discard return cb(req, LS, resource, id) proc patchTag(tags: var seq[string], index: int, op, path, value: string): bool = LOG.debug("- PATCH -> $1 tag['$2'] = \"$3\" - Total tags: $4." % [op, $index, $value, $tags.len]) case op: of "remove": let tag = tags[index] if not tag.startsWith("$"): tags[index] = "" # Not removing element, otherwise subsequent indexes won't work! else: raise newException(EInvalidRequest, "cannot remove system tag: $1" % tag) of "add": if value.match(PEG_USER_TAG): tags.insert(value, index) else: if value.strip == "": raise newException(EInvalidRequest, "tag not specified." % value) else: raise newException(EInvalidRequest, "invalid tag: $1" % value) of "replace": if value.match(PEG_USER_TAG): if tags[index].startsWith("$"): raise newException(EInvalidRequest, "cannot replace system tag: $1" % tags[index]) else: tags[index] = value else: if value.strip == "": raise newException(EInvalidRequest, "tag not specified." % value) else: raise newException(EInvalidRequest, "invalid tag: $1" % value) of "test": if tags[index] != value: return false else: raise newException(EInvalidRequest, "invalid patch operation: $1" % op) return true proc patchData*(data: var JsonNode, origData: JsonNode, op: string, path: string, value: JsonNode): bool = LOG.debug("- PATCH -> $1 path $2 with $3" % [op, path, $value]) var keys = path.replace(peg"^\/data\/", "").split("/") if keys.len == 0: raise newException(EInvalidRequest, "no valid path specified: $1" % path) var d = data var dorig = origData var c = 1 for key in keys: if d.kind == JArray: try: var index = key.parseInt if c >= keys.len: d.elems[index] = value case op: of "remove": d.elems.del(index) of "add": d.elems.insert(value, index) of "replace": d.elems[index] = value of "test": if d.elems[index] != value: return false else: raise newException(EInvalidRequest, "invalid patch operation: $1" % op) else: d = d[index] dorig = dorig[index] except CatchableError: raise newException(EInvalidRequest, "invalid index key '$1' in path '$2'" % [key, path]) else: if c >= keys.len: case op: of "remove": if d.hasKey(key): d.delete(key) else: raise newException(EInvalidRequest, "key '$1' not found in path '$2'" % [key, path]) of "add": d[key] = value of "replace": if d.hasKey(key): d[key] = value else: raise newException(EInvalidRequest, "key '$1' not found in path '$2'" % [key, path]) of "test": if dorig.hasKey(key): if dorig[key] != value: return false else: raise newException(EInvalidRequest, "key '$1' not found in path '$2'" % [key, path]) else: raise newException(EInvalidRequest, "invalid patch operation: $1" % op) else: d = d[key] dorig = dorig[key] c += 1 return true proc applyPatchOperation*(data: var JsonNode, origData: JsonNode, tags: var seq[ string], op: string, path: string, value: JsonNode): bool = var matches = @[""] let p = peg""" path <- ^tagPath / fieldPath$ tagPath <- '\/tags\/' {\d+} fieldPath <- '\/data\/' ident ('\/' ident)* ident <- [a-zA-Z0-9_]+ / '-' """ if path.find(p, matches) == -1: raise newException(EInvalidRequest, "cannot patch path '$1'" % path) if path.match(peg"^\/tags\/"): let index = matches[0].parseInt if value.kind != JString: raise newException(EInvalidRequest, "tag '$1' is not a string." % $value) let tag = value.getStr return patchTag(tags, index, op, path, tag) elif tags.contains("$subtype:json"): return patchData(data, origData, op, path, value) else: raise newException(EInvalidRequest, "cannot patch data of a non-JSON document.") # Low level procs proc getTag*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse = let doc = LS.store.retrieveTag(id, options) result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) if doc == newJNull(): result = resTagNotFound(id) else: result.content = $doc result.code = Http200 proc getStore*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse = if (not LSDICT.hasKey(id)): return resStoreNotFound(id) let store = LSDICT[id] var doc = newJObject() doc["id"] = %id doc["file"] = %store.file doc["config"] = store.config result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = $doc result.code = Http200 proc getIndex*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse = let doc = LS.store.retrieveIndex(id, options) result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) if doc == newJNull(): result = resIndexNotFound(id) else: result.content = $doc result.code = Http200 proc getRawDocument*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse = let doc = LS.store.retrieveRawDocument(id, options) result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) if doc == "": result = resDocumentNotFound(id) else: result.content = doc result.code = Http200 proc getDocument*(LS: LiteStore, id: string, options = newQueryOptions(), req: LSRequest): LSResponse = let doc = LS.store.retrieveDocument(id, options) if doc.data == "": result = resDocumentNotFound(id) else: result.headers = doc.contenttype.ctHeader setOrigin(LS, req, result.headers) result.content = doc.data result.code = Http200 proc deleteDocument*(LS: LiteStore, id: string, req: LSRequest): LSResponse = let doc = LS.store.retrieveDocument(id) if doc.data == "": result = resDocumentNotFound(id) else: try: let res = LS.store.destroyDocument(id) if res == 0: result = resError(Http500, "Unable to delete document '$1'" % id) else: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Content-Length"] = "0" result.content = "" result.code = Http204 except CatchableError: result = resError(Http500, "Unable to delete document '$1'" % id) proc getTags*(LS: LiteStore, options: QueryOptions = newQueryOptions(), req: LSRequest): LSResponse = var options = options let t0 = cpuTime() let docs = LS.store.retrieveTags(options) let orig_limit = options.limit let orig_offset = options.offset options.limit = 0 options.offset = 0 options.select = @["COUNT(tag_id)"] let total = LS.store.countTags(prepareSelectTagsQuery(options), options.like.replace("*", "%")) var content = newJObject() if options.like != "": content["like"] = %(options.like.decodeURL) if orig_limit > 0: content["limit"] = %orig_limit if orig_offset > 0: content["offset"] = %orig_offset content["total"] = %total content["execution_time"] = %(cputime()-t0) content["results"] = docs result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = content.pretty result.code = Http200 proc getStores(LS: LiteStore, options: QueryOptions = newQueryOptions(), req: LSRequest): LSResponse = let t0 = cpuTime() var docs = newJArray() for k, v in LSDICT.pairs: var store = newJObject() store["id"] = %k store["file"] = %v.file store["config"] = v.config docs.add(store) var content = newJObject() content["total"] = %LSDICT.len content["execution_time"] = %(cputime()-t0) content["results"] = docs result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = content.pretty result.code = Http200 proc getIndexes*(LS: LiteStore, options: QueryOptions = newQueryOptions(), req: LSRequest): LSResponse = var options = options let t0 = cpuTime() let docs = LS.store.retrieveIndexes(options) let orig_limit = options.limit let orig_offset = options.offset options.limit = 0 options.offset = 0 options.select = @["COUNT(name)"] let total = LS.store.countIndexes(prepareSelectIndexesQuery(options), options.like.replace("*", "%")) var content = newJObject() if options.like != "": content["like"] = %(options.like.decodeURL) if orig_limit > 0: content["limit"] = %orig_limit if orig_offset > 0: content["offset"] = %orig_offset content["total"] = %total content["execution_time"] = %(cputime()-t0) content["results"] = docs result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = content.pretty result.code = Http200 proc getRawDocuments*(LS: LiteStore, options: QueryOptions = newQueryOptions(), req: LSRequest): LSResponse = var options = options let t0 = cpuTime() let docs = LS.store.retrieveRawDocuments(options) let orig_limit = options.limit let orig_offset = options.offset options.limit = 0 options.offset = 0 options.select = @["COUNT(docid)"] let total = LS.store.retrieveRawDocuments(options)[0].num var content = newJObject() if options.folder != "": content["folder"] = %(options.folder) if options.search != "": content["search"] = %(options.search.decodeURL) if options.tags != "": content["tags"] = newJArray() for tag in options.tags.replace("+", "%2B").decodeURL.split(","): content["tags"].add(%tag) if orig_limit > 0: content["limit"] = %orig_limit if orig_offset > 0: content["offset"] = %orig_offset if options.orderby != "": content["sort"] = %options.orderby content["total"] = %total content["execution_time"] = %(cputime()-t0) content["results"] = docs result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = content.pretty result.code = Http200 proc getInfo*(LS: LiteStore, req: LSRequest): LSResponse = let info = LS.store.retrieveInfo() let version = info[0] let total_documents = info[1] let total_tags = LS.store.countTags() let tags = LS.store.retrieveTagsWithTotals() var content = newJObject() content["version"] = %(LS.appname & " v" & LS.appversion) content["datastore_version"] = %version content["api_version"] = %7 content["size"] = %($((LS.file.getFileSize().float/(1024*1024)).formatFloat( ffDecimal, 2)) & " MB") content["read_only"] = %LS.readonly content["log_level"] = %LS.loglevel if LS.directory.len == 0: content["directory"] = newJNull() else: content["directory"] = %LS.directory content["mount"] = %LS.mount if LS.config != newJNull() and LS.config.hasKey("stores") and LS.config[ "stores"].len > 0: content["additional_stores"] = %toSeq(LS.config["stores"].keys) else: content["additional_stores"] = newJArray() if LS.auth != newJNull(): content["auth"] = %true else: content["auth"] = %false content["total_documents"] = %total_documents content["total_tags"] = %total_tags content["tags"] = tags result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = content.pretty result.code = Http200 proc putIndex*(LS: LiteStore, id, field: string, req: LSRequest): LSResponse = try: if (not id.match(PEG_INDEX)): return resError(Http400, "invalid index ID: $1" % id) if (not field.match(PEG_JSON_FIELD)): return resError(Http400, "invalid field path: $1" % field) if (LS.store.retrieveIndex(id) != newJNull()): return resError(Http409, "Index already exists: $1" % id) LS.store.createIndex(id, field) result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = "{\"id\": \"$1\", \"field\": \"$2\"}" % [id, field] result.code = Http201 except CatchableError: eWarn() result = resError(Http500, "Unable to create index.") proc putStore*(LS: LiteStore, id: string, config: JsonNode, req: LSRequest): LSResponse = try: if (not id.match(PEG_STORE) or id == "master"): return resError(Http400, "invalid store ID: $1" % id) if (LSDICT.hasKey(id)): return resError(Http409, "Store already exists: $1" % id) let store = LS.addStore(id, id & ".db", config) LS.updateConfig() LSDICT[id] = store result = getStore(LS, id, newQueryOptions(), req) result.code = Http201 except CatchableError: eWarn() result = resError(Http500, "Unable to create store.") proc deleteIndex*(LS: LiteStore, id: string, req: LSRequest): LSResponse = if (not id.match(PEG_INDEX)): return resError(Http400, "invalid index ID: $1" % id) if (LS.store.retrieveIndex(id) == newJNull()): return resError(Http404, "Index not found: $1" % id) try: LS.store.dropIndex(id) result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Content-Length"] = "0" result.content = "" result.code = Http204 except CatchableError: eWarn() result = resError(Http500, "Unable to delete index.") proc deleteStore*(LS: LiteStore, id: string, req: LSRequest): LSResponse = if (not id.match(PEG_STORE)): return resError(Http400, "invalid store ID: $1" % id) if (not LSDICT.hasKey(id)): return resError(Http404, "Store not found: $1" % id) try: LSDICT.del(id) if LS.config.hasKey("stores") and LS.config["stores"].hasKey(id): LS.config["stores"].delete(id) LS.updateConfig() result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Content-Length"] = "0" result.content = "" result.code = Http204 except CatchableError: eWarn() result = resError(Http500, "Unable to delete index.") proc postDocument*(LS: LiteStore, body: string, ct: string, folder = "", req: LSRequest): LSResponse = if not folder.isFolder: return resError(Http400, "Invalid folder specified when creating document: $1" % folder) try: var doc = LS.store.createDocument(folder, body, ct) if doc != "": result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = doc result.code = Http201 else: result = resError(Http500, "Unable to create document.") except CatchableError: eWarn() result = resError(Http500, "Unable to create document.") proc putDocument*(LS: LiteStore, id: string, body: string, ct: string, req: LSRequest): LSResponse = if id.isFolder: return resError(Http400, "Invalid ID '$1' (Document IDs cannot end with '/')." % id) let doc = LS.store.retrieveDocument(id) if doc.data == "": # Create a new document var doc = LS.store.createDocument(id, body, ct) if doc != "": result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = doc result.code = Http201 else: result = resError(Http500, "Unable to create document.") else: # Update existing document try: var doc = LS.store.updateDocument(id, body, ct) if doc != "": result.headers = ctJsonHeader() setOrigin(LS, req, result.headers) result.content = doc result.code = Http200 else: result = resError(Http500, "Unable to update document '$1'." % id) except CatchableError: result = resError(Http500, "Unable to update document '$1'." % id) proc patchDocument*(LS: LiteStore, id: string, body: string, req: LSRequest): LSResponse = var apply = true let jbody = body.parseJson if jbody.kind != JArray: return resError(Http400, "Bad request: PATCH request body is not an array.") var options = newQueryOptions() options.select = @["documents.id AS id", "created", "modified", "data"] let doc = LS.store.retrieveRawDocument(id, options) if doc == "": return resDocumentNotFound(id) let jdoc = doc.parseJson var tags = newSeq[string]() var origTags = newSeq[string]() for tag in jdoc["tags"].items: tags.add(tag.str) origTags.add(tag.str) var data: JsonNode var origData: JsonNode if tags.contains("$subtype:json"): try: origData = jdoc["data"].getStr.parseJson data = origData.copy except CatchableError: discard var c = 1 for item in jbody.items: if item.hasKey("op") and item.hasKey("path"): if not item.hasKey("value"): item["value"] = %"" try: apply = applyPatchOperation(data, origData, tags, item["op"].str, item[ "path"].str, item["value"]) if not apply: break except CatchableError: return resError(Http400, "Bad request - $1" % getCurrentExceptionMsg()) else: return resError(Http400, "Bad request: patch operation #$1 is malformed." % $c) c.inc if apply: # when document is not JSON the origData is not defined # the extra check allows editing tags for non-JSON documents if origData != nil and origData.len > 0 and origData != data: try: var doc = LS.store.updateDocument(id, data.pretty, "application/json") if doc == "": return resError(Http500, "Unable to patch document '$1'." % id) except CatchableError: return resError(Http500, "Unable to patch document '$1' - $2" % id, getCurrentExceptionMsg()) if origTags != tags: try: for t1 in jdoc["tags"].items: discard LS.store.destroyTag(t1.str, id, true) for t2 in tags: if t2 != "": LS.store.createTag(t2, id, true) except CatchableError: return resError(Http500, "Unable to patch document '$1' - $2" % [id, getCurrentExceptionMsg()]) return LS.getRawDocument(id, newQueryOptions(), req) # Main routing proc options*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse = case resource: of "info": result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" if id != "": return resError(Http404, "Info '$1' not found." % id) else: result.code = Http204 result.content = "" of "dir": result.code = Http204 result.content = "" result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" of "assets": result.code = Http204 result.content = "" result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" of "tags": result.code = Http204 result.content = "" result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" of "indexes": result.code = Http204 result.content = "" result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) if id != "": result.code = Http204 result.content = "" if LS.readonly: result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" else: result.headers["Allow"] = "GET, OPTIONS, PUT, DELETE" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS, PUT, DELETE" else: result.code = Http204 result.content = "" if LS.readonly: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" else: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" of "docs": var folder: string if id.isFolder: folder = id if folder.len > 0: result.code = Http204 result.content = "" if LS.readonly: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "HEAD, GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS" else: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "HEAD, GET, OPTIONS, POST, PUT" result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS, POST, PUT" elif id != "": result.code = Http204 result.content = "" if LS.readonly: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "HEAD, GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS" else: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "HEAD, GET, OPTIONS, PUT, PATCH, DELETE" result.headers["Allow-Patch"] = "application/json-patch+json" result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS, PUT, PATCH, DELETE" else: result.code = Http204 result.content = "" if LS.readonly: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "HEAD, GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS" else: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "HEAD, GET, OPTIONS, POST" result.headers["Access-Control-Allow-Methods"] = "HEAD, GET, OPTIONS, POST" of "stores": result.code = Http204 result.content = "" result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) if id != "": result.code = Http204 result.content = "" if LS.readonly: result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" else: result.headers["Allow"] = "GET, OPTIONS, PUT, DELETE" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS, PUT, DELETE" else: result.code = Http204 result.content = "" if LS.readonly: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" else: result.headers = newHttpHeaders(TAB_HEADERS) setOrigin(LS, req, result.headers) result.headers["Allow"] = "GET, OPTIONS" result.headers["Access-Control-Allow-Methods"] = "GET, OPTIONS" else: discard # never happens really. proc head*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse = var options = newQueryOptions() options.select = @["documents.id AS id", "created", "modified"] if id.isFolder: options.folder = id try: parseQueryOptions(req.url.query, options); if id != "" and options.folder == "": result = LS.getRawDocument(id, options, req) result.content = "" else: result = LS.getRawDocuments(options, req) result.content = "" except CatchableError: return resError(Http400, "Bad request - $1" % getCurrentExceptionMsg()) proc get*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse = case resource: of "docs": var options = newQueryOptions() if id.isFolder: options.folder = id if req.url.query.contains("contents=false"): options.select = @["documents.id AS id", "created", "modified"] try: parseQueryOptions(req.url.query, options); if id != "" and options.folder == "": if req.url.query.contains("raw=true") or req.headers.hasKey( "Accept") and req.headers["Accept"] == "application/json": return LS.getRawDocument(id, options, req) else: return LS.getDocument(id, options, req) else: return LS.getRawDocuments(options, req) except CatchableError: let e = getCurrentException() let trace = e.getStackTrace() echo trace return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg()) of "assets": var options = newQueryOptions() if id.isFolder: options.folder = id try: parseQueryOptions(req.url.query, options); if id != "" and options.folder == "": return LS.getDocument(id, options, req) else: options.folder = "" result = LS.getDocument(id & "index.html", options, req) if result.code == Http404: result = LS.getDocument(id & "index.htm", options, req) return result except CatchableError: let e = getCurrentException() let trace = e.getStackTrace() echo trace return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg()) of "tags": var options = newQueryOptions() try: parseQueryOptions(req.url.query, options); if id != "": return LS.getTag(id, options, req) else: return LS.getTags(options, req) except CatchableError: return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg()) of "indexes": var options = newQueryOptions() try: parseQueryOptions(req.url.query, options); if id != "": return LS.getIndex(id, options, req) else: return LS.getIndexes(options, req) except CatchableError: return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg()) of "stores": var options = newQueryOptions() try: parseQueryOptions(req.url.query, options); if id != "": return LS.getStore(id, options, req) else: return LS.getStores(options, req) except CatchableError: return resError(Http400, "Bad Request - $1" % getCurrentExceptionMsg()) of "info": if id != "": return resError(Http404, "Info '$1' not found." % id) return LS.getInfo(req) else: discard # never happens really. proc post*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse = var ct = "text/plain" if req.headers.hasKey("Content-Type"): ct = req.headers["Content-Type"] return LS.postDocument(req.body.strip, ct, id, req) proc put*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse = if id != "": if resource == "indexes": var field = "" try: field = parseJson(req.body.strip)["field"].getStr except CatchableError: return resError(Http400, "Bad Request - Invalid JSON body - $1" % getCurrentExceptionMsg()) return LS.putIndex(id, field, req) elif resource == "stores": var config = newJNull() try: config = parseJson(req.body) except CatchableError: return resError(Http400, "Bad Request - Invalid JSON body - $1" % getCurrentExceptionMsg()) return LS.putStore(id, config, req) else: # Assume docs var ct = "text/plain" if req.headers.hasKey("Content-Type"): ct = req.headers["Content-Type"] return LS.putDocument(id, req.body.strip, ct, req) else: return resError(Http400, "Bad request: document ID must be specified in PUT requests.") proc delete*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse = if id != "": if resource == "indexes": return LS.deleteIndex(id, req) elif resource == "stores": return LS.deleteStore(id, req) else: # Assume docs return LS.deleteDocument(id, req) else: return resError(Http400, "Bad request: document ID must be specified in DELETE requests.") proc patch*(req: LSRequest, LS: LiteStore, resource: string, id = ""): LSResponse = if id != "": return LS.patchDocument(id, req.body, req) else: return resError(Http400, "Bad request: document ID must be specified in PATCH requests.") proc serveFile*(req: LSRequest, LS: LiteStore, id: string): LSResponse = let path = LS.directory / id var reqMethod = $req.reqMethod if req.headers.hasKey("X-HTTP-Method-Override"): reqMethod = req.headers["X-HTTP-Method-Override"] case reqMethod.toUpperAscii: of "OPTIONS": return validate(req, LS, "dir", id, options) of "GET": if path.fileExists: try: let contents = path.readFile let parts = path.splitFile if CONTENT_TYPES.hasKey(parts.ext): result.headers = CONTENT_TYPES[parts.ext].ctHeader else: result.headers = ctHeader("text/plain") setOrigin(LS, req, result.headers) result.content = contents result.code = Http200 except CatchableError: return resError(Http500, "Unable to read file '$1'." % path) else: return resError(Http404, "File '$1' not found." % path) else: return resError(Http405, "Method not allowed: $1" % $req.reqMethod) proc route*(req: LSRequest, LS: LiteStore, resource = "docs", id = ""): LSResponse = var reqMethod = $req.reqMethod if req.headers.hasKey("X-HTTP-Method-Override"): reqMethod = req.headers["X-HTTP-Method-Override"] LOG.debug("ROUTE - resource: " & resource & " id: " & id) case reqMethod.toUpperAscii: of "POST": if LS.readonly: return resError(Http405, "Method not allowed: $1" % $req.reqMethod) return validate(req, LS, resource, id, post) of "PUT": if LS.readonly: return resError(Http405, "Method not allowed: $1" % $req.reqMethod) return validate(req, LS, resource, id, put) of "DELETE": if LS.readonly: return resError(Http405, "Method not allowed: $1" % $req.reqMethod) return validate(req, LS, resource, id, delete) of "HEAD": return validate(req, LS, resource, id, head) of "OPTIONS": return validate(req, LS, resource, id, options) of "GET": return validate(req, LS, resource, id, get) of "PATCH": if LS.readonly: return resError(Http405, "Method not allowed: $1" % $req.reqMethod) return validate(req, LS, resource, id, patch) else: return resError(Http405, "Method not allowed: $1" % $req.reqMethod) proc multiRoute(req: LSRequest, resource, id: string): LSResponse = var matches = @["", "", ""] if req.url.path.find(PEG_STORE_URL, matches) != -1: let id = matches[0] let path = "/v7/" & matches[1] matches = @["", "", ""] discard path.find(PEG_URL, matches) return req.route(LSDICT[id], matches[1], matches[2]) return req.route(LS, resource, id) proc newSimpleLSRequest(meth: HttpMethod, resource = "", id = "", body = "", params = "", headers = newHttpHeaders()): LSRequest = result.reqMethod = meth result.body = body result.headers = headers result.url = parseUri("$1://$2:$3/$4/$5?$6" % @["http", "localhost", "9500", resource, id, params]) proc get(resource, id: string, params = ""): LSResponse = return newSimpleLSRequest(HttpGet, resource, id, "", params).multiRoute( resource, id) proc post(resource, folder, body: string, ct = ""): LSResponse = var headers = newHttpHeaders() if ct != "": headers["Content-Type"] = ct return newSimpleLSRequest(HttpPost, resource, folder, body, "", headers).multiRoute(resource, folder & "/") proc put(resource, id, body: string, ct = ""): LSResponse = var headers = newHttpHeaders() if ct != "": headers["Content-Type"] = ct return newSimpleLSRequest(HttpPut, resource, id, body, "", headers).multiRoute(resource, id) proc patch(resource, id, body: string): LSResponse = var headers = newHttpHeaders() headers["Content-Type"] = "application/json" return newSimpleLSRequest(HttpPatch, resource, id, body, "", headers).multiRoute(resource, id) proc delete(resource, id: string): LSResponse = return newSimpleLSRequest(HttpDelete, resource, id).multiRoute(resource, id) proc head(resource, id: string): LSResponse = return newSimpleLSRequest(HttpHead, resource, id).multiRoute(resource, id) proc toHeaders(obj: JsonNode): HttpHeaders = var headers = newSeq[tuple[key: string, val: string]](0) for k, v in obj.pairs: headers.add (key: k, val: v.getstr) return newHttpHeaders(headers) proc toJson(headers: HttpHeaders): JsonNode = result = newJObject() for k, v in headers.pairs: result[k] = newJString(v) proc registerHttpApi(LS: LiteStore, ctx: DTContext) = var api_idx = ctx.duk_push_object() # GET var get: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} = let url = $duk_get_string(ctx, 0) let headers = $duk_get_string(ctx, 1) let client = newHttpClient(headers = ( headers).parseJson.toHeaders) let resp = client.get(url) var res_idx = ctx.duk_push_object() ctx.duk_push_int(cast[cint](resp.code)) discard ctx.duk_put_prop_string(res_idx, "code") discard ctx.duk_push_string(resp.body.cstring) discard ctx.duk_put_prop_string(res_idx, "content") discard ctx.duk_push_string(resp.headers.toJson.pretty.cstring) discard ctx.duk_put_prop_string(res_idx, "headers") return 1 ) discard duk_push_c_function(ctx, get, 2) discard ctx.duk_put_prop_string(api_idx, "get") discard ctx.duk_put_global_string("$http") proc registerStoreApi(LS: LiteStore, ctx: DTContext, origResource, origId: string) = var api_idx = ctx.duk_push_object() # GET var get: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} = let resource = duk_get_string(ctx, 0) let id = duk_get_string(ctx, 1) let params = duk_get_string(ctx, 2) let resp = get($resource, $id, $params) var res_idx = ctx.duk_push_object() ctx.duk_push_int(cast[cint](resp.code)) discard ctx.duk_put_prop_string(res_idx, "code") discard ctx.duk_push_string(resp.content.cstring) discard ctx.duk_put_prop_string(res_idx, "content") return 1 ) discard duk_push_c_function(ctx, get, 3) discard ctx.duk_put_prop_string(api_idx, "get") # POST var post: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} = let resource = duk_get_string(ctx, 0) let folder = duk_get_string(ctx, 1) let body = duk_get_string(ctx, 2) let ct = duk_get_string(ctx, 3) let resp = post($resource, $folder, $body, $ct) var res_idx = ctx.duk_push_object() ctx.duk_push_int(cast[cint](resp.code)) discard ctx.duk_put_prop_string(res_idx, "code") discard ctx.duk_push_string(resp.content.cstring) discard ctx.duk_put_prop_string(res_idx, "content") return 1 ) discard duk_push_c_function(ctx, post, 4) discard ctx.duk_put_prop_string(api_idx, "post") # PUT var put: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} = let resource = duk_get_string(ctx, 0) let id = duk_get_string(ctx, 1) let body = duk_get_string(ctx, 2) let ct = duk_get_string(ctx, 3) let resp = put($resource, $id, $body, $ct) var res_idx = ctx.duk_push_object() ctx.duk_push_int(cast[cint](resp.code)) discard ctx.duk_put_prop_string(res_idx, "code") discard ctx.duk_push_string(resp.content.cstring) discard ctx.duk_put_prop_string(res_idx, "content") return 1 ) discard duk_push_c_function(ctx, put, 4) discard ctx.duk_put_prop_string(api_idx, "put") # PATCH var patch: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} = let resource = duk_get_string(ctx, 0) let id = duk_get_string(ctx, 1) let body = duk_get_string(ctx, 2) let resp = patch($resource, $id, $body) var res_idx = ctx.duk_push_object() ctx.duk_push_int(cast[cint](resp.code)) discard ctx.duk_put_prop_string(res_idx, "code") discard ctx.duk_push_string(resp.content.cstring) discard ctx.duk_put_prop_string(res_idx, "content") return 1 ) discard duk_push_c_function(ctx, patch, 3) discard ctx.duk_put_prop_string(api_idx, "patch") # DELETE var delete: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} = let resource = duk_get_string(ctx, 0) let id = duk_get_string(ctx, 1) let resp = delete($resource, $id) var res_idx = ctx.duk_push_object() ctx.duk_push_int(cast[cint](resp.code)) discard ctx.duk_put_prop_string(res_idx, "code") discard ctx.duk_push_string(resp.content.cstring) discard ctx.duk_put_prop_string(res_idx, "content") return 1 ) discard duk_push_c_function(ctx, delete, 2) discard ctx.duk_put_prop_string(api_idx, "delete") # HEAD var head: DTCFunction = (proc (ctx: DTContext): cint{.stdcall.} = let resource = duk_get_string(ctx, 0) let id = duk_get_string(ctx, 1) let resp = head($resource, $id) var res_idx = ctx.duk_push_object() ctx.duk_push_int(cast[cint](resp.code)) discard ctx.duk_put_prop_string(res_idx, "code") discard ctx.duk_push_string(resp.content.cstring) discard ctx.duk_put_prop_string(res_idx, "content") return 1 ) discard duk_push_c_function(ctx, head, 2) discard ctx.duk_put_prop_string(api_idx, "head") discard ctx.duk_put_global_string("$store") proc jError(ctx: DTContext): LSResponse = return resError(Http500, "Middleware Error: " & $ctx.duk_safe_to_string(-1)) proc getMiddleware*(LS: LiteStore, id: string): string = if not LS.middleware.hasKey(id): # Attempt to retrieve resource from system documents let options = newQueryOptions(true) let doc = LS.store.retrieveDocument("middleware/" & id & ".js", options) result = doc.data if result == "": LOG.warn("Middleware '$1' not found" % id) else: result = LS.middleware[id] proc getMiddlewareSeq(LS: LiteStore, resource, id, meth: string): seq[string] = result = newSeq[string]() if LS.config.kind != JObject or not LS.config.hasKey("resources"): return 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 & "/*" if LS.config["resources"].hasKey(currentPaths) and LS.config["resources"][ currentPaths].hasKey(meth) and LS.config["resources"][currentPaths][ meth].hasKey("middleware"): let mw = LS.config["resources"][currentPaths][meth]["middleware"] if (mw.kind == JArray): for m in mw: result.add m.getStr if LS.config["resources"].hasKey(reqUri) and LS.config["resources"][ reqUri].hasKey(meth) and LS.config["resources"][reqUri][meth].hasKey("middleware"): let mw = LS.config["resources"][reqUri][meth]["middleware"] if (mw.kind == JArray): for m in mw: result.add m.getStr proc execute*(req: var LSRequest, LS: LiteStore, resource, id: string): LSResponse = let middleware = getMiddlewareSeq(LS, resource, id, $req.reqMethod) if middleware.len > 0: LOG.debug("Middleware: " & middleware.join(" -> ")); if middleware.len == 0: return route(req, LS, resource, id) var jReq = $( %* req) LOG.debug("Request: " & jReq) var jRes = """{ "code": 200, "content": {}, "final": false, "headers": { "Access-Control-Allow-Origin": "*", "Access-Control-Allow-Headers": "Authorization, Content-Type", "Server": "$1", "Content-Type": "application/json" } }""" % [LS.appname & "/" & LS.appversion] var context = "{}" # Create execution context var ctx = duk_create_heap_default() duk_console_init(ctx) duk_print_alert_init(ctx) LS.registerStoreApi(ctx, resource, id) LS.registerHttpApi(ctx) if ctx.duk_peval_string(cstring("($1)" % $jReq)) != 0: return jError(ctx) discard ctx.duk_put_global_string("$req") if ctx.duk_peval_string(cstring("($1)" % $jRes)) != 0: return jError(ctx) discard ctx.duk_put_global_string("$res") if ctx.duk_peval_string(cstring("($1)" % $context)) != 0: return jError(ctx) discard ctx.duk_put_global_string("$ctx") # Middleware-specific functions var i = 0 var abort = 0 while abort != 1 and i < middleware.len: let code = LS.getMiddleware(middleware[i]) LOG.debug("Evaluating middleware '$1'" % middleware[i]) if ctx.duk_peval_string(code.cstring) != 0: return jError(ctx) abort = ctx.duk_get_boolean(-1) i.inc # Retrieve response, and request if ctx.duk_peval_string("JSON.stringify($res);") != 0: return jError(ctx) let fRes = parseJson($(ctx.duk_get_string(-1))).newLSResponse if ctx.duk_peval_string("JSON.stringify($req);") != 0: return jError(ctx) let fReq = parseJson($(ctx.duk_get_string(-1))).newLSRequest() ctx.duk_destroy_heap(); LOG.debug("abort: $1", [$abort]) if abort == 1: return fRes return route(fReq, LS, resource, id) |