mirror of https://github.com/knative/pkg.git
82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
/*
|
|
Copyright 2019 The Knative Authors
|
|
|
|
Licensed 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 cloudevents
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
)
|
|
|
|
// Client wraps Builder, and is intended to be configured for a single event
|
|
// type and target
|
|
type Client struct {
|
|
builder Builder
|
|
Target string
|
|
}
|
|
|
|
// NewClient returns a CloudEvent Client used to send CloudEvents. It is
|
|
// intended that a user would create a new client for each tuple of eventType
|
|
// and target. This is an optional helper method to avoid the tricky creation
|
|
// of the embedded Builder struct.
|
|
func NewClient(target string, builder Builder) *Client {
|
|
c := &Client{
|
|
builder: builder,
|
|
Target: target,
|
|
}
|
|
return c
|
|
}
|
|
|
|
// Send creates a request based on the client's settings and sends the data
|
|
// struct to the target set for this client. It returns error if there was an
|
|
// issue sending the event, otherwise nil means the event was accepted.
|
|
func (c *Client) Send(data interface{}, overrides ...SendContext) error {
|
|
req, err := c.builder.Build(c.Target, data, overrides...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
client := &http.Client{}
|
|
resp, err := client.Do(req)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer resp.Body.Close()
|
|
if accepted(resp) {
|
|
return nil
|
|
}
|
|
return fmt.Errorf("error sending cloudevent: %s", status(resp))
|
|
}
|
|
|
|
// accepted is a helper method to understand if the response from the target
|
|
// accepted the CloudEvent.
|
|
func accepted(resp *http.Response) bool {
|
|
if resp.StatusCode >= 200 && resp.StatusCode < 300 {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// status is a helper method to read the response of the target.
|
|
func status(resp *http.Response) string {
|
|
status := resp.Status
|
|
body, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
return fmt.Sprintf("Status[%s] error reading response body: %v", status, err)
|
|
}
|
|
return fmt.Sprintf("Status[%s] %s", status, body)
|
|
}
|