| /* |
| * 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. |
| */ |
| |
| package http |
| |
| import ( |
| "github.com/apache/servicecomb-mesher/proxy/common" |
| "github.com/apache/servicecomb-mesher/proxy/ingress" |
| "github.com/go-chassis/go-chassis/v2/client/rest" |
| chassiscommon "github.com/go-chassis/go-chassis/v2/core/common" |
| "github.com/go-chassis/go-chassis/v2/core/handler" |
| "github.com/go-chassis/go-chassis/v2/core/invocation" |
| "github.com/go-chassis/openlog" |
| "net/http" |
| ) |
| |
| func handleIncomingTraffic(inv *invocation.Invocation) (*invocation.Response, error) { |
| c, err := handler.GetChain(chassiscommon.Provider, common.ChainProviderIncoming) |
| if err != nil { |
| openlog.Error("Get chain failed: " + err.Error()) |
| return nil, err |
| } |
| var invRsp *invocation.Response |
| c.Next(inv, func(ir *invocation.Response) { |
| invRsp = ir |
| }) |
| return invRsp, nil |
| } |
| |
| //HandleIngressTraffic is api gateway http handler |
| func HandleIngressTraffic(w http.ResponseWriter, r *http.Request) { |
| inv := &invocation.Invocation{} |
| inv.Reply = rest.NewResponse() |
| inv.Protocol = "rest" |
| inv.Args = r |
| h := make(map[string]string) |
| for k := range r.Header { |
| h[k] = r.Header.Get(k) |
| } |
| inv.Ctx = chassiscommon.NewContext(h) |
| invResp, err := handleIncomingTraffic(inv) |
| if err != nil { |
| handleErrorResponse(inv, w, http.StatusInternalServerError, err) |
| return |
| } |
| if invResp != nil { |
| if invResp.Status != 0 || invResp.Err != nil { |
| handleErrorResponse(inv, w, invResp.Status, invResp.Err) |
| return |
| } |
| } |
| rule, err := ingress.DefaultFetcher.Fetch("http", r.Host, r.URL.Path, r.Header) |
| if err != nil { |
| handleErrorResponse(inv, w, http.StatusInternalServerError, err) |
| return |
| } |
| inv.MicroServiceName = rule.Service.Name |
| targetAPI := r.URL.Path |
| if rule.Service.RedirectPath != "" { |
| targetAPI = rule.Service.RedirectPath |
| } |
| newReq, err := http.NewRequest(r.Method, "http://"+inv.MicroServiceName+targetAPI, r.Body) |
| if err != nil { |
| handleErrorResponse(inv, w, http.StatusInternalServerError, err) |
| return |
| } |
| inv.Args = newReq |
| h[XForwardedPort] = rule.Service.Port.Value |
| c, err := handler.GetChain(chassiscommon.Consumer, common.ChainConsumerOutgoing) |
| if err != nil { |
| handleErrorResponse(inv, w, http.StatusBadGateway, err) |
| openlog.Error("Get chain failed: " + err.Error()) |
| return |
| } |
| var invRsp *invocation.Response |
| c.Next(inv, func(ir *invocation.Response) { |
| //Send the request to the destination |
| invRsp = ir |
| }) |
| resp, err := handleRequest(w, inv, invRsp) |
| if err != nil { |
| openlog.Error("Handle request failed: " + err.Error()) |
| return |
| } |
| RecordStatus(inv, resp.StatusCode) |
| } |