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cors example

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Former-commit-id: 31f25c5b3f0e02050bf9b120e903f56d1af35eeb
This commit is contained in:
Gerasimos (Makis) Maropoulos 2020-05-16 03:22:45 +03:00
parent 44eafe739b
commit f482e13fb7
3 changed files with 57 additions and 38 deletions
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41
_examples/experimental-handlers/cors/simple/client/index.html Normal file
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@ -0,0 +1,41 @@
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Example CORS</title>
</head>
<body>
<script type="text/javascript">
// Replace the "host" with your domain (you can use iris.WithTunneling).
const host = 'https://e1de7bc1.ngrok.io';
async function postData(url = '', data = {}) {
const response = await fetch(url, {
method: 'POST',
mode: 'cors',
cache: 'no-cache',
credentials: 'same-origin',
headers: {
'Content-Type': 'application/json'
},
redirect: 'follow',
referrerPolicy: 'no-referrer',
body: JSON.stringify(data)
});
return response.json();
}
postData(host + '/api/v1/mailer', {
email: "me@test.com"
})
.then(data => {
console.log(data);
document.write(data.message);
});
</script>
</body>
</html>

32
_examples/experimental-handlers/cors/simple/client/main.go
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@ -1,38 +1,14 @@
package main
import (
"github.com/kataras/iris/v12"
)
// NOTE: THIS IS OPTIONALLY.
// It is just an example of communication between cors/simple/main.go and your app
// based on issues that beginners had with it.
// You should use your own favourite library for HTTP requests (any programming language ofc).
//
// Replace the '8fc93b1c.ngrok.io' with a domain which
// exposes the cors/simple/main.go server side.
const url = "http://8fc93b1c.ngrok.io/api/v1/mailer"
var clientSide = []byte(`<script type="text/javascript">
fetch("` + url + `", {
headers: {
"Content-Type": "application/json",
"Access-Control-Allow-Origin": "*"
},
method: "POST",
mode: "cors",
body: JSON.stringify({ email: "mymail@mail.com" }),
});
</script>`)
import "github.com/kataras/iris/v12"
func main() {
app := iris.New()
app.Get("/", func(ctx iris.Context) {
ctx.Write(clientSide)
ctx.ServeFile("index.html")
})
// Start and navigate to http://localhost:8080
// and go to the previous terminal of your running cors/simple/main.go server
// and see the logs.
// Read index.html comments,
// adn then start and navigate to http://localhost:8080.
app.Listen(":8080")
}

22
_examples/experimental-handlers/cors/simple/main.go
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@ -1,8 +1,6 @@
package main
import (
"github.com/kataras/iris/v12"
)
import "github.com/kataras/iris/v12"
func main() {
app := iris.New()
@ -10,7 +8,14 @@ func main() {
crs := func(ctx iris.Context) {
ctx.Header("Access-Control-Allow-Origin", "*")
ctx.Header("Access-Control-Allow-Credentials", "true")
ctx.Header("Access-Control-Allow-Headers", "Access-Control-Allow-Origin,Content-Type")
if ctx.Method() == iris.MethodOptions {
ctx.Header("Access-Control-Methods", "POST, PUT, PATCH, DELETE")
ctx.Header("Access-Control-Allow-Headers", "Access-Control-Allow-Origin,Content-Type")
ctx.Header("Access-Control-Max-Age", "86400")
ctx.StatusCode(iris.StatusNoContent)
return
}
ctx.Next()
} // or "github.com/iris-contrib/middleware/cors"
@ -25,6 +30,8 @@ func main() {
return
}
ctx.Application().Logger().Infof("received %#+v", any)
ctx.JSON(iris.Map{"message": "ok"})
})
v1.Get("/home", func(ctx iris.Context) {
@ -44,10 +51,5 @@ func main() {
})
}
// iris.WithoutPathCorrectionRedirection | iris#Configuration.DisablePathCorrectionRedirection:
// CORS needs the allow origin headers in the redirect response as well, we have a solution for this:
// Add the iris.WithoutPathCorrectionRedirection option
// to directly fire the handler instead of redirection (which is the default behavior)
// on request paths like "/v1/mailer/" when "/v1/mailer" route handler is registered.
app.Listen(":80", iris.WithoutPathCorrectionRedirection)
app.Listen(":80", iris.WithTunneling)
}