smruthi2187andGitHub
8984e4916e
This feature allows creation of fission objects in different namespaces, in addition to retaining the existing behavior of creating fission objects in default namespace if user doesnt provide one. It also removes cluster admin roles for fission-fetcher and fission-builder Service Accounts and grants them only those privileges that they need.
123 lines
2.8 KiB
Go
123 lines
2.8 KiB
Go
/*
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Copyright 2017 The Fission Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package publisher
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import (
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"bytes"
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"io/ioutil"
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"log"
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"net/http"
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"strings"
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"time"
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)
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type (
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// A webhook publisher for a single URL. Satisifies the Publisher interface.
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WebhookPublisher struct {
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requestChannel chan *publishRequest
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maxRetries int
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retryDelay time.Duration
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baseUrl string
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}
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publishRequest struct {
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body string
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headers map[string]string
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target string
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retries int
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retryDelay time.Duration
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}
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)
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func MakeWebhookPublisher(baseUrl string) *WebhookPublisher {
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p := &WebhookPublisher{
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baseUrl: baseUrl,
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requestChannel: make(chan *publishRequest, 32), // buffered channel
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// TODO make this configurable
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maxRetries: 10,
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retryDelay: 500 * time.Millisecond,
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}
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go p.svc()
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return p
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}
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func (p *WebhookPublisher) Publish(body string, headers map[string]string, target string) {
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// serializing the request gives user a guarantee that the request is sent in sequence order
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p.requestChannel <- &publishRequest{
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body: body,
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headers: headers,
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target: target,
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retries: p.maxRetries,
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retryDelay: p.retryDelay,
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}
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}
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func (p *WebhookPublisher) svc() {
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for {
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r := <-p.requestChannel
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p.makeHttpRequest(r)
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}
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}
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func (p *WebhookPublisher) makeHttpRequest(r *publishRequest) {
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url := p.baseUrl + "/" + strings.TrimPrefix(r.target, "/")
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log.Printf("Making HTTP request to %v", url)
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var buf bytes.Buffer
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buf.WriteString(r.body)
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// Create request
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req, err := http.NewRequest("POST", url, &buf)
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for k, v := range r.headers {
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req.Header.Add(k, v)
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}
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// Make the request
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resp, err := http.DefaultClient.Do(req)
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// All done if the request succeeded with 200 OK.
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if err == nil && resp.StatusCode == 200 {
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resp.Body.Close()
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return
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}
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// Log errors
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if err != nil {
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log.Printf("Request failed: %v", r)
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} else if resp.StatusCode != 200 {
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log.Printf("Request returned failure: %v", resp.StatusCode)
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body, err := ioutil.ReadAll(resp.Body)
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resp.Body.Close()
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if err == nil {
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log.Printf("request error: %v", string(body))
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}
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}
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// Schedule a retry, or give up if out of retries
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r.retries--
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if r.retries > 0 {
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r.retryDelay *= time.Duration(2)
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time.AfterFunc(r.retryDelay, func() {
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p.requestChannel <- r
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})
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} else {
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log.Printf("Final retry failed, giving up on %v", url)
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// Event dropped
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}
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}
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