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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,160 @@ | ||
| -- | ||
| -- Licensed to the Apache Software Foundation (ASF) under one or more | ||
| -- contributor license agreements. See the NOTICE file distributed with | ||
| -- this work for additional information regarding copyright ownership. | ||
| -- The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| -- (the "License"); you may not use this file except in compliance with | ||
| -- the License. You may obtain a copy of the License at | ||
| -- | ||
| -- http://www.apache.org/licenses/LICENSE-2.0 | ||
| -- | ||
| -- Unless required by applicable law or agreed to in writing, software | ||
| -- distributed under the License is distributed on an "AS IS" BASIS, | ||
| -- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| -- See the License for the specific language governing permissions and | ||
| -- limitations under the License. | ||
| -- | ||
| local core = require("apisix.core") | ||
| local gq_parse = require("graphql").parse | ||
| local req_set_body_data = ngx.req.set_body_data | ||
| local ipairs = ipairs | ||
| local pcall = pcall | ||
| local type = type | ||
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| local schema = { | ||
| type = "object", | ||
| properties = { | ||
| query = { | ||
| type = "string", | ||
| minLength = 1, | ||
| maxLength = 1024, | ||
| }, | ||
| variables = { | ||
| type = "array", | ||
| items = { | ||
| type = "string" | ||
| }, | ||
| minItems = 1, | ||
| }, | ||
| operation_name = { | ||
| type = "string", | ||
| minLength = 1, | ||
| maxLength = 1024 | ||
| }, | ||
| }, | ||
| required = {"query"}, | ||
| } | ||
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| local plugin_name = "degraphql" | ||
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| local _M = { | ||
| version = 0.1, | ||
| priority = 509, | ||
| name = plugin_name, | ||
| schema = schema, | ||
| } | ||
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| function _M.check_schema(conf) | ||
| local ok, err = core.schema.check(schema, conf) | ||
| if not ok then | ||
| return false, err | ||
| end | ||
|
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| local ok, res = pcall(gq_parse, conf.query) | ||
| if not ok then | ||
| return false, "failed to parse query: " .. res | ||
| end | ||
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| if #res.definitions > 1 and not conf.operation_name then | ||
| return false, "operation_name is required if multiple operations are present in the query" | ||
| end | ||
| return true | ||
| end | ||
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| local function fetch_post_variables(conf) | ||
| local req_body, err = core.request.get_body() | ||
| if err ~= nil then | ||
| core.log.error("failed to get request body: ", err) | ||
| return nil, 503 | ||
| end | ||
|
|
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| if not req_body then | ||
| core.log.error("missing request body") | ||
| return nil, 400 | ||
| end | ||
|
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| -- JSON as the default content type | ||
| req_body, err = core.json.decode(req_body) | ||
| if type(req_body) ~= "table" then | ||
| core.log.error("invalid request body can't be decoded: ", err or "bad type") | ||
| return nil, 400 | ||
| end | ||
|
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| local variables = {} | ||
| for _, v in ipairs(conf.variables) do | ||
| variables[v] = req_body[v] | ||
| end | ||
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| return variables | ||
| end | ||
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| local function fetch_get_variables(conf) | ||
| local args = core.request.get_uri_args() | ||
| local variables = {} | ||
| for _, v in ipairs(conf.variables) do | ||
| variables[v] = args[v] | ||
| end | ||
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| return variables | ||
| end | ||
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| function _M.access(conf, ctx) | ||
| local meth = core.request.get_method() | ||
| if meth ~= "POST" and meth ~= "GET" then | ||
| return 405 | ||
| end | ||
|
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| local new_body = core.table.new(0, 3) | ||
|
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| if conf.variables then | ||
| local variables, code | ||
| if meth == "POST" then | ||
| variables, code = fetch_post_variables(conf) | ||
| else | ||
| variables, code = fetch_get_variables(conf) | ||
| end | ||
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| if not variables then | ||
| return code | ||
| end | ||
|
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| if meth == "POST" then | ||
| new_body["variables"] = variables | ||
| else | ||
| new_body["variables"] = core.json.encode(variables) | ||
| end | ||
| end | ||
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| new_body["operationName"] = conf.operation_name | ||
| new_body["query"] = conf.query | ||
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| if meth == "POST" then | ||
| if not conf.variables then | ||
| -- the set_body_data requires to read the body first | ||
| core.request.get_body() | ||
| end | ||
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| core.request.set_header(ctx, "Content-Type", "application/json") | ||
| req_set_body_data(core.json.encode(new_body)) | ||
| else | ||
| core.request.set_uri_args(ctx, new_body) | ||
| end | ||
| end | ||
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| return _M |
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