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Forward client HTTP headers through pipeline

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This commit is contained in:
Alex
2017-03-31 09:10:09 +01:00
committed by Alex Ellis
parent a740783c78
commit c705cd8e33
6 changed files with 80 additions and 18 deletions
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19
gateway/handlers/proxy.go
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@ -103,6 +103,14 @@ func lookupSwarmService(serviceName string, c *client.Client) (bool, error) {
return len(services) > 0, err
}
func copyHeaders(destination *http.Header, source *http.Header) {
for k, vv := range *source {
vvClone := make([]string, len(vv))
copy(vvClone, vv)
(*destination)[k] = vvClone
}
}
func invokeService(w http.ResponseWriter, r *http.Request, metrics metrics.MetricOptions, service string, requestBody []byte, logger *logrus.Logger, proxyClient *http.Client) {
stamp := strconv.FormatInt(time.Now().Unix(), 10)
@ -123,14 +131,12 @@ func invokeService(w http.ResponseWriter, r *http.Request, metrics metrics.Metri
}
contentType := r.Header.Get("Content-Type")
if len(contentType) == 0 {
contentType = "text/plain"
}
fmt.Printf("[%s] Forwarding request [%s] to: %s\n", stamp, contentType, url)
request, err := http.NewRequest("POST", url, bytes.NewReader(requestBody))
request.Header.Add("Content-Type", contentType)
copyHeaders(&request.Header, &r.Header)
defer request.Body.Close()
response, err := proxyClient.Do(request)
@ -152,6 +158,9 @@ func invokeService(w http.ResponseWriter, r *http.Request, metrics metrics.Metri
return
}
clientHeader := w.Header()
copyHeaders(&clientHeader, &response.Header)
// Match header for strict services
w.Header().Set("Content-Type", r.Header.Get("Content-Type"))