mirror of https://github.com/status-im/op-geth.git
133 lines
5.0 KiB
Go
133 lines
5.0 KiB
Go
// Copyright 2017 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package http
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"html/template"
|
|
"net/http"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/metrics"
|
|
"github.com/ethereum/go-ethereum/swarm/api"
|
|
)
|
|
|
|
var (
|
|
htmlCounter = metrics.NewRegisteredCounter("api.http.errorpage.html.count", nil)
|
|
jsonCounter = metrics.NewRegisteredCounter("api.http.errorpage.json.count", nil)
|
|
plaintextCounter = metrics.NewRegisteredCounter("api.http.errorpage.plaintext.count", nil)
|
|
)
|
|
|
|
type ResponseParams struct {
|
|
Msg template.HTML
|
|
Code int
|
|
Timestamp string
|
|
template *template.Template
|
|
Details template.HTML
|
|
}
|
|
|
|
// ShowMultipleChoices is used when a user requests a resource in a manifest which results
|
|
// in ambiguous results. It returns a HTML page with clickable links of each of the entry
|
|
// in the manifest which fits the request URI ambiguity.
|
|
// For example, if the user requests bzz:/<hash>/read and that manifest contains entries
|
|
// "readme.md" and "readinglist.txt", a HTML page is returned with this two links.
|
|
// This only applies if the manifest has no default entry
|
|
func ShowMultipleChoices(w http.ResponseWriter, r *http.Request, list api.ManifestList) {
|
|
log.Debug("ShowMultipleChoices", "ruid", GetRUID(r.Context()), "uri", GetURI(r.Context()))
|
|
msg := ""
|
|
if list.Entries == nil {
|
|
respondError(w, r, "Could not resolve", http.StatusInternalServerError)
|
|
return
|
|
}
|
|
requestUri := strings.TrimPrefix(r.RequestURI, "/")
|
|
|
|
uri, err := api.Parse(requestUri)
|
|
if err != nil {
|
|
respondError(w, r, "Bad Request", http.StatusBadRequest)
|
|
}
|
|
|
|
uri.Scheme = "bzz-list"
|
|
msg += fmt.Sprintf("Disambiguation:<br/>Your request may refer to multiple choices.<br/>Click <a class=\"orange\" href='"+"/"+uri.String()+"'>here</a> if your browser does not redirect you within 5 seconds.<script>setTimeout(\"location.href='%s';\",5000);</script><br/>", "/"+uri.String())
|
|
respondTemplate(w, r, "error", msg, http.StatusMultipleChoices)
|
|
}
|
|
|
|
func respondTemplate(w http.ResponseWriter, r *http.Request, templateName, msg string, code int) {
|
|
log.Debug("respondTemplate", "ruid", GetRUID(r.Context()), "uri", GetURI(r.Context()))
|
|
respond(w, r, &ResponseParams{
|
|
Code: code,
|
|
Msg: template.HTML(msg),
|
|
Timestamp: time.Now().Format(time.RFC1123),
|
|
template: TemplatesMap[templateName],
|
|
})
|
|
}
|
|
|
|
func respondError(w http.ResponseWriter, r *http.Request, msg string, code int) {
|
|
log.Info("respondError", "ruid", GetRUID(r.Context()), "uri", GetURI(r.Context()), "code", code, "msg", msg)
|
|
respondTemplate(w, r, "error", msg, code)
|
|
}
|
|
|
|
func respond(w http.ResponseWriter, r *http.Request, params *ResponseParams) {
|
|
w.WriteHeader(params.Code)
|
|
|
|
if params.Code >= 400 {
|
|
w.Header().Del("Cache-Control")
|
|
w.Header().Del("ETag")
|
|
}
|
|
|
|
acceptHeader := r.Header.Get("Accept")
|
|
// this cannot be in a switch since an Accept header can have multiple values: "Accept: */*, text/html, application/xhtml+xml, application/xml;q=0.9, */*;q=0.8"
|
|
if strings.Contains(acceptHeader, "application/json") {
|
|
if err := respondJSON(w, r, params); err != nil {
|
|
respondError(w, r, "Internal server error", http.StatusInternalServerError)
|
|
}
|
|
} else if strings.Contains(acceptHeader, "text/html") {
|
|
respondHTML(w, r, params)
|
|
} else {
|
|
respondPlaintext(w, r, params) //returns nice errors for curl
|
|
}
|
|
}
|
|
|
|
func respondHTML(w http.ResponseWriter, r *http.Request, params *ResponseParams) {
|
|
htmlCounter.Inc(1)
|
|
log.Info("respondHTML", "ruid", GetRUID(r.Context()), "code", params.Code)
|
|
err := params.template.Execute(w, params)
|
|
if err != nil {
|
|
log.Error(err.Error())
|
|
}
|
|
}
|
|
|
|
func respondJSON(w http.ResponseWriter, r *http.Request, params *ResponseParams) error {
|
|
jsonCounter.Inc(1)
|
|
log.Info("respondJSON", "ruid", GetRUID(r.Context()), "code", params.Code)
|
|
w.Header().Set("Content-Type", "application/json")
|
|
return json.NewEncoder(w).Encode(params)
|
|
}
|
|
|
|
func respondPlaintext(w http.ResponseWriter, r *http.Request, params *ResponseParams) error {
|
|
plaintextCounter.Inc(1)
|
|
log.Info("respondPlaintext", "ruid", GetRUID(r.Context()), "code", params.Code)
|
|
w.Header().Set("Content-Type", "text/plain")
|
|
strToWrite := "Code: " + fmt.Sprintf("%d", params.Code) + "\n"
|
|
strToWrite += "Message: " + string(params.Msg) + "\n"
|
|
strToWrite += "Timestamp: " + params.Timestamp + "\n"
|
|
_, err := w.Write([]byte(strToWrite))
|
|
return err
|
|
}
|