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not_found.go
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/
not_found.go
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package buffalo
import (
"encoding/json"
"net/http"
"github.com/gobuffalo/plush"
"github.com/pkg/errors"
)
// NotFoundHandler is the default ErrorHandler for 404 responses.
// In development mode it attempts to return useful debugging
// information. In production it defaults to use the http.NotFound
// handler.
func NotFoundHandler(status int, err error, c Context) error {
env := c.Value("env")
req := c.Request()
res := c.Response()
if env != nil && env.(string) == "production" {
http.NotFound(res, req)
return nil
}
data := map[string]interface{}{
"routes": c.Value("routes"),
"method": req.Method,
"path": req.URL.String(),
"error": err.Error(),
}
ct := req.Header.Get("Content-Type")
if ct == "application/json" {
res.WriteHeader(404)
return json.NewEncoder(res).Encode(data)
}
ctx := plush.NewContextWith(data)
t, err := plush.Render(htmlNotFound, ctx)
if err != nil {
return errors.WithStack(err)
}
res.WriteHeader(404)
_, err = res.Write([]byte(t))
return err
}
var htmlNotFound = `
<html>
<head>
<title>404 PAGE NOT FOUND</title>
<style>
body {
font-family: helvetica;
}
table {
width: 100%;
}
th {
text-align: left;
}
tr:nth-child(even) {
background-color: #dddddd;
}
td {
margin: 0px;
padding: 10px;
}
</style>
</head>
<body>
<h1>404 Page Not Found!</h1>
<h3>Could not find path <code>[<%= method %>] <%= path %></code></h3>
<hr>
<table id="buffalo-routes-table">
<thead>
<tr>
<th>METHOD</th>
<th>PATH</th>
<th>NAME</th>
<th>HANDLER</th>
</tr>
</thead>
<tbody>
<%= for (route) in routes { %>
<tr>
<td><%= route.Method %></td>
<td><%= route.Path %></td>
<td><%= route.PathName %></td>
<td><code><%= route.HandlerName %></code></td>
</tr>
<% } %>
</tbody>
</table>
<%= if (error) { %>
<hr>
<h2>Error</h2>
<pre><%= error %></pre>
<% } %>
</body>
</html>
`