问题描述
示例代码位于：
我猜这是使用Google App上的sendgrid-go的非常旧的示例代码发动机。
我尝试了4个排列组合，每次都失败：
https://api.sendgrid.com/v3/mail/send：http.DefaultTransport和http.DefaultClient在App Engine中不可用。请参阅https://cloud.google.com/appengine/docs/go/urlfetch/
这里是一些日志记录的最低硬编码尝试：
包sendgridgo
导入（
github.com/sendgrid/sendgrid-go
fmt
_google.golang.org/appengine
净/ http
google。 golang.org/appengine/log
google.golang.org/appengine
google.golang.org/appengine/urlfetch
_github.com/sendgrid/sendgrid- go / helpers / mail
）
func init（）{
http.HandleFunc（/，IndexHandler）
appengine.Main（）
}
func IndexHandler（w http.ResponseWriter，r * http.Request）{
ctx：= appengine.NewContext（r）
log.Infof ctx，IndexHandler）
sg：= sendgrid.NewSendClient（SENDGRID_API_KEY）
log.Infof（ctx，％v，sg）
bob：= urlfetch.Client（ctx ）
log.Infof（ctx，UrlFetchClient％v，bob）
// resp，err：= s g.Send（m）
request：= sendgrid.GetRequest（SENDGRID_API_KEY，/ v3 / mail / send，https://api.sendgrid.com）
request.Method = POST
request.Body = [] byte（`{
personalizations：[
{
to：[
{
email：[email protected]
}
]，
subject：用SendGrid发送很有趣
}
]，
from：{
email：[email protected]
}，
content：[
{
type：text / plain，
value：在任何地方都很容易做到，即使使用Go
}
]
}`）
resp，err：= sendgrid.API（请求）
如果err！= nil {
log.Errorf（ctx，Failed％v，err）
}
fmt.Fprint（w，resp）
}
8不同的尝试，包括尝试在Google Cloud文档中发布的使用Sendgrid博客的示例（来自Sendgrid博客的示例），并试图使用已弃用的Sendgrid api版本，我发现Sendgrid curl示例位于：
curl --request POST \
--url https：/ /api.sendgrid.com/v3/mail/send \
--header'Authorization：Bearer YOUR_API_KEY'\
--header'Content-Type：application / json'\
--data'{personalizations：[{to：[{email：[email protected]}]}]，from：{email：[email protected] }，subject：Hello，World！，content：[{type：text / plain，value：Heya！}]}'
<$ p $ p> client：= urlfetch.Client（ctx）
request，err：= http.NewRequest（POST，https://api.sendgrid.com/v3 / mail / send，buf）
if err！= nil {
log.Errorf（ctx，Failed Request％v，request）
}
request.Header。 Set（Authorization，Bearer SENDGRID_API_KEY）
request.Header.Set（Content-Type，application / json）
resp，err：= client.Do（request）
一个复活节周末，稍后，它可以工作！
The example code at: https://sendgrid.com/blog/send-email-go-google-app-engine/
My guess this is very old sample code to use sendgrid-go on Google App Engine.
I've attempted 4 permutations and failed each time with:
https://api.sendgrid.com/v3/mail/send: http.DefaultTransport and http.DefaultClient are not available in App Engine. See https://cloud.google.com/appengine/docs/go/urlfetch/
Here is a minimum hardcoded attempt with some logging:
package sendgridgo
import(
"github.com/sendgrid/sendgrid-go"
"fmt"
_"google.golang.org/appengine"
"net/http"
"google.golang.org/appengine/log"
"google.golang.org/appengine"
"google.golang.org/appengine/urlfetch"
_ "github.com/sendgrid/sendgrid-go/helpers/mail"
)
func init(){
http.HandleFunc("/", IndexHandler)
appengine.Main()
}
func IndexHandler (w http.ResponseWriter, r *http.Request){
ctx := appengine.NewContext(r)
log.Infof(ctx, "IndexHandler")
sg := sendgrid.NewSendClient("SENDGRID_API_KEY")
log.Infof(ctx, "%v", sg)
bob := urlfetch.Client(ctx)
log.Infof(ctx, "UrlFetchClient %v", bob)
//resp, err := sg.Send(m)
request := sendgrid.GetRequest("SENDGRID_API_KEY", "/v3/mail/send", "https://api.sendgrid.com")
request.Method = "POST"
request.Body = []byte(` {
"personalizations": [
{
"to": [
{
"email": "[email protected]"
}
],
"subject": "Sending with SendGrid is Fun"
}
],
"from": {
"email": "[email protected]"
},
"content": [
{
"type": "text/plain",
"value": "and easy to do anywhere, even with Go"
}
]
}`)
resp, err := sendgrid.API(request)
if err != nil{
log.Errorf(ctx, "Failed %v", err)
}
fmt.Fprint(w, resp)
}
After 8 different attempts, including trying an example published in Google Cloud docs for using Sendgrid, an example from Sendgrid blog, and trying to use deprecated versions of Sendgrid api, I found Sendgrid curl examples at:
https://sendgrid.com/docs/Classroom/Send/v3_Mail_Send/curl_examples.html
curl --request POST \
--url https://api.sendgrid.com/v3/mail/send \
--header 'Authorization: Bearer YOUR_API_KEY' \
--header 'Content-Type: application/json' \
--data '{"personalizations": [{"to": [{"email": "[email protected]"}]}],"from": {"email": "[email protected]"},"subject": "Hello, World!","content": [{"type": "text/plain", "value": "Heya!"}]}'
I then translated the HelloWorld example to into URLFetch usage
client := urlfetch.Client(ctx)
request, err := http.NewRequest("POST", "https://api.sendgrid.com/v3/mail/send", buf)
if err != nil {
log.Errorf(ctx, "Failed Request %v", request)
}
request.Header.Set("Authorization", "Bearer SENDGRID_API_KEY")
request.Header.Set("Content-Type", "application/json")
resp, err := client.Do(request)
One Easter weekend, later, it works!
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