working couchdb reverse proxy behind webapp binary.

backend/pkg/web/handler/couchdb_proxy.go

@@ -0,0 +1,38 @@
+package handler
+
+import (
+	"fmt"
+	"github.com/fastenhealth/fastenhealth-onprem/backend/pkg/config"
+	"github.com/gin-gonic/gin"
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"strings"
+)
+
+func CouchDBProxy(c *gin.Context) {
+	appConfig := c.MustGet("CONFIG").(config.Interface)
+
+	couchdbUrl := fmt.Sprintf("%s://%s:%s", appConfig.GetString("web.couchdb.scheme"), appConfig.GetString("web.couchdb.host"), appConfig.GetString("web.couchdb.port"))
+	remote, err := url.Parse(couchdbUrl)
+	if err != nil {
+		panic(err)
+	}
+
+	proxy := httputil.NewSingleHostReverseProxy(remote)
+	//Define the director func
+	//This is a good place to log, for example
+	proxy.Director = func(req *http.Request) {
+		req.Header = c.Request.Header
+		req.Header.Add("X-Forwarded-Host", req.Host)
+		req.Header.Add("X-Origin-Host", remote.Host)
+		req.Host = remote.Host
+		req.URL.Scheme = remote.Scheme
+		req.URL.Host = remote.Host
+		log.Printf(c.Param("proxyPath"))
+		req.URL.Path = strings.TrimPrefix(c.Param("proxyPath"), "/database")
+	}
+
+	proxy.ServeHTTP(c.Writer, c.Request)
+}

backend/pkg/web/server.go

@@ -42,6 +42,8 @@ func (ae *AppEngine) Setup(logger *logrus.Entry) *gin.Engine {
 
 			api.POST("/auth/signup", handler.AuthSignup)
 			api.GET("/metadata/source", handler.GetMetadataSource)
+
+			r.Any("/database/*proxyPath", handler.CouchDBProxy)
 		}
 	}
 

frontend/src/app/services/fasten-db.service.ts

@@ -27,10 +27,11 @@ export class FastenDbService extends PouchdbRepository {
 
   //TODO: move most of this functionality back into the lib as a separate file.
   replicationHandler: any
-  remotePouchEndpoint = "http://localhost:5984"
+  remotePouchEndpoint: string // "http://localhost:5984"
   constructor(private _httpClient: HttpClient) {
     const userIdentifier = localStorage.getItem("current_user")
     super(userIdentifier, "my-secret-encryption-key");
+    this.remotePouchEndpoint = `${window.location.protocol}//${window.location.host}${this.getBasePath()}/database`
     if(userIdentifier){
       this.enableSync(userIdentifier)
     }