forked from gobuffalo/buffalo
/
errors.go
162 lines (152 loc) · 3.34 KB
/
errors.go
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package buffalo
import (
"encoding/json"
"fmt"
"strings"
"github.com/gobuffalo/plush"
"github.com/pkg/errors"
)
// HTTPError a typed error returned by http Handlers and used for choosing error handlers
type HTTPError struct {
Status int `json:"status"`
Cause error `json:"error"`
}
func (h HTTPError) Error() string {
return h.Cause.Error()
}
// ErrorHandler interface for handling an error for a
// specific status code.
type ErrorHandler func(int, error, Context) error
// ErrorHandlers is used to hold a list of ErrorHandler
// types that can be used to handle specific status codes.
/*
a.ErrorHandlers[500] = func(status int, err error, c buffalo.Context) error {
res := c.Response()
res.WriteHeader(status)
res.Write([]byte(err.Error()))
return nil
}
*/
type ErrorHandlers map[int]ErrorHandler
// Get a registered ErrorHandler for this status code. If
// no ErrorHandler has been registered, a default one will
// be returned.
func (e ErrorHandlers) Get(status int) ErrorHandler {
if eh, ok := e[status]; ok {
return eh
}
return defaultErrorHandler
}
func defaultErrorHandler(status int, err error, c Context) error {
env := c.Value("env")
c.Logger().Error(err)
if env != nil && env.(string) == "production" {
c.Response().WriteHeader(status)
c.Response().Write([]byte(prodErrorTmpl))
return nil
}
c.Response().WriteHeader(status)
msg := fmt.Sprintf("%+v", err)
ct := c.Request().Header.Get("Content-Type")
switch strings.ToLower(ct) {
case "application/json", "text/json", "json":
err = json.NewEncoder(c.Response()).Encode(map[string]interface{}{
"error": msg,
"code": status,
})
case "application/xml", "text/xml", "xml":
default:
data := map[string]interface{}{
"routes": c.Value("routes"),
"error": msg,
"status": status,
"data": c.Data(),
}
ctx := plush.NewContextWith(data)
t, err := plush.Render(devErrorTmpl, ctx)
if err != nil {
return errors.WithStack(err)
}
res := c.Response()
res.WriteHeader(404)
_, err = res.Write([]byte(t))
return err
}
return err
}
var devErrorTmpl = `
<html>
<head>
<title><%= status %> - ERROR!</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;
}
pre {
display: block;
padding: 9.5px;
margin: 0 0 10px;
font-size: 13px;
line-height: 1.42857143;
color: #333;
word-break: break-all;
word-wrap: break-word;
background-color: #f5f5f5;
border: 1px solid #ccc;
border-radius: 4px;
}
</style>
</head>
<body>
<h1><%= status %> - ERROR!</h1>
<pre><%= error %></pre>
<hr>
<h3>Context</h3>
<pre><%= for (k, v) in data { %>
<%= inspect(k) %>: <%= inspect(v) %>
<% } %></pre>
<hr>
<h3>Routes</h3>
<table id="buffalo-routes-table">
<thead>
<tr>
<th>METHOD</th>
<th>PATH</th>
<th>HANDLER</th>
</tr>
</thead>
<tbody>
<%= for (route) in routes { %>
<tr>
<td><%= route.Method %></td>
<td><%= route.Path %></td>
<td><code><%= route.HandlerName %></code></td>
</tr>
<% } %>
</tbody>
</table>
</body>
</html>
`
var prodErrorTmpl = `
<h1>We're Sorry!</h1>
<p>
It looks like something went wrong! Don't worry, we are aware of the problem and are looking into it.
</p>
<p>
Sorry if this has caused you any problems. Please check back again later.
</p>
`