google app engine - Go sendgrid failing -


im trying send mail sendgrid , golang. im using "github.com/sendgrid/sendgrid-go"

whenever run part sending email in code, error:

sendgrid.go: error:net/http: client transport of type init.failingtransport doesn't support cancelrequest; timeout not supported; response:<nil>

i cant figure out is..

this code:

sg := sendgrid.newsendgridclientwithapikey("string")     email := sendgrid.newmail()     email.addto(req.email)     email.setsubject("confirm registration @ domain")     email.setfrom("noreply@domain.com")     email.setfromname("domain")     email.settext(url)     if r := sg.send(email); r == nil {         log.infof(ctx, "email sent")     } else {         log.errorf(ctx, "email not sent %v", r)         w.writeheader(http.statusinternalservererror)         return     }

normal sendgrid api usage in go

the minimal program use sendgrid api in go following:

package main  import (     "fmt"     "github.com/sendgrid/sendgrid-go" )  func main() {     key := "sendgrid_api_key"     sg := sendgrid.newsendgridclientwithapikey(key)      message := sendgrid.newmail()     message.addto("ezra@usefultiftrue.com")     message.setfrom("test@example.org")     message.setsubject("subject here")     message.sethtml("body of email")      if r := sg.send(message); r == nil {         fmt.println("sent!")     } else {         fmt.println(r)     } }

you can see sendgrid go documentation on github.

quirks on app engine

the issue you're attempting fetch url using default net/http client, not allowed app engine. you must use urlfetch make http requests on app engine.

you can solve specifying *http.client use urlfetch, since sendgrid uses client uses disallowed http.defaulttransport default. init.failingtransport dummy transport method throws error.

this simple change. import "appengine/urlfetch" , add

client := urlfetch.client(ctx)

a complete example of sendgrid go api on app engine

package ezralalonde  import (     "appengine"     "appengine/urlfetch"     "fmt"     "github.com/sendgrid/sendgrid-go"     "net/http" )  func send(w http.responsewriter, r *http.request) {     key := "sendgrid_api_key"     sg := sendgrid.newsendgridclientwithapikey(key)      // must change net/http client not use default transport     ctx := appengine.newcontext(r)     client := urlfetch.client(ctx)     sg.client = client // <-- using urlfetch, "overriding" default      message := sendgrid.newmail()     message.addto("ezra@usefultiftrue.com")     message.setfrom("test@example.org")     message.setsubject("subject here")     message.sethtml("body of email")      if e := sg.send(message); e == nil {         fmt.fprintln(w, "sent!")     } else {         fmt.fprintln(w, e)     } }  func init() {     http.handlefunc("/", send) }

now each visit / cause email sent sendgrid test@example.org.

to: test@example.org from: ezra@usefuliftrue.com subject: subject here  body of email

please note

do not include api keys in source code, or commit them source control. above method not advisable.


Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in...
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^...
Read more