cmd: add --prefix option to rqlite

If e.g. rqlite is embedded in some other HTTP engine via forwarding or
something, it might not be at /; let's allow the client to talk to rqlite
in this case.

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>

cmd/rqlite/execute.go

@@ -21,7 +21,7 @@ type executeResponse struct {
 }
 
 func execute(ctx *cli.Context, cmd, line string, argv *argT) error {
-	urlStr := fmt.Sprintf("%s://%s:%d/db/execute?pretty&timings", argv.Protocol, argv.Host, argv.Port)
+	urlStr := fmt.Sprintf("%s://%s:%d%sdb/execute?pretty&timings", argv.Protocol, argv.Host, argv.Port, argv.Prefix)
 	ret := &executeResponse{}
 	if err := sendRequest(ctx, urlStr, line, ret); err != nil {
 		return err

cmd/rqlite/main.go

@@ -18,6 +18,7 @@ type argT struct {
 	Protocol string `cli:"s,scheme" usage:"protocol scheme (http or https)" dft:"http"`
 	Host     string `cli:"H,host" usage:"rqlited host address" dft:"127.0.0.1"`
 	Port     uint16 `cli:"p,port" usage:"rqlited host port" dft:"4001"`
+	Prefix   string `cli:"P,prefix" usage:"rqlited HTTP prefix" dft:"/"`
 }
 
 func main() {

cmd/rqlite/query.go

@@ -80,7 +80,7 @@ type queryResponse struct {
 }
 
 func query(ctx *cli.Context, cmd, line string, argv *argT) error {
-	urlStr := fmt.Sprintf("%s://%s:%d/db/query?timings", argv.Protocol, argv.Host, argv.Port)
+	urlStr := fmt.Sprintf("%s://%s:%d%sdb/query?timings", argv.Protocol, argv.Host, argv.Port, argv.Prefix)
 	ret := &queryResponse{}
 	if err := sendRequest(ctx, urlStr, line, ret); err != nil {
 		return err