From ac193e36ce4bce752717124433a8ce84c347dbf7 Mon Sep 17 00:00:00 2001
From: holisticode <holistic.computing@gmail.com>
Date: Fri, 8 Sep 2017 13:29:09 -0500
Subject: swarm/api/http: add error pages (#14967)
---
swarm/api/api.go | 1 +
swarm/api/http/error.go | 116 ++++++++++++
swarm/api/http/error_templates.go | 376 ++++++++++++++++++++++++++++++++++++++
swarm/api/http/error_test.go | 143 +++++++++++++++
swarm/api/http/server.go | 37 ++--
swarm/api/http/server_test.go | 9 +-
6 files changed, 662 insertions(+), 20 deletions(-)
create mode 100644 swarm/api/http/error.go
create mode 100644 swarm/api/http/error_templates.go
create mode 100644 swarm/api/http/error_test.go
(limited to 'swarm')
diff --git a/swarm/api/api.go b/swarm/api/api.go
index 7d185ab3c..a5941fb5c 100644
--- a/swarm/api/api.go
+++ b/swarm/api/api.go
@@ -132,6 +132,7 @@ func (self *Api) Put(content, contentType string) (storage.Key, error) {
func (self *Api) Get(key storage.Key, path string) (reader storage.LazySectionReader, mimeType string, status int, err error) {
trie, err := loadManifest(self.dpa, key, nil)
if err != nil {
+ status = http.StatusNotFound
log.Warn(fmt.Sprintf("loadManifestTrie error: %v", err))
return
}
diff --git a/swarm/api/http/error.go b/swarm/api/http/error.go
new file mode 100644
index 000000000..ebb5e3ebe
--- /dev/null
+++ b/swarm/api/http/error.go
@@ -0,0 +1,116 @@
+// 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/>.
+
+/*
+Show nicely (but simple) formatted HTML error pages (or respond with JSON
+if the appropriate `Accept` header is set)) for the http package.
+*/
+package http
+
+import (
+ "encoding/json"
+ "fmt"
+ "html/template"
+ "net/http"
+ "time"
+
+ "github.com/ethereum/go-ethereum/log"
+)
+
+//templateMap holds a mapping of an HTTP error code to a template
+var templateMap map[int]*template.Template
+
+//parameters needed for formatting the correct HTML page
+type ErrorParams struct {
+ Msg string
+ Code int
+ Timestamp string
+ template *template.Template
+ Details template.HTML
+}
+
+//we init the error handling right on boot time, so lookup and http response is fast
+func init() {
+ initErrHandling()
+}
+
+func initErrHandling() {
+ //pages are saved as strings - get these strings
+ genErrPage := GetGenericErrorPage()
+ notFoundPage := GetNotFoundErrorPage()
+ //map the codes to the available pages
+ tnames := map[int]string{
+ 0: genErrPage, //default
+ 400: genErrPage,
+ 404: notFoundPage,
+ 500: genErrPage,
+ }
+ templateMap = make(map[int]*template.Template)
+ for code, tname := range tnames {
+ //assign formatted HTML to the code
+ templateMap[code] = template.Must(template.New(fmt.Sprintf("%d", code)).Parse(tname))
+ }
+}
+
+//ShowError is used to show an HTML error page to a client.
+//If there is an `Accept` header of `application/json`, JSON will be returned instead
+//The function just takes a string message which will be displayed in the error page.
+//The code is used to evaluate which template will be displayed
+//(and return the correct HTTP status code)
+func ShowError(w http.ResponseWriter, r *http.Request, msg string, code int) {
+ if code == http.StatusInternalServerError {
+ log.Error(msg)
+ }
+ respond(w, r, &ErrorParams{
+ Code: code,
+ Msg: msg,
+ Timestamp: time.Now().Format(time.RFC1123),
+ template: getTemplate(code),
+ })
+}
+
+//evaluate if client accepts html or json response
+func respond(w http.ResponseWriter, r *http.Request, params *ErrorParams) {
+ w.WriteHeader(params.Code)
+ if r.Header.Get("Accept") == "application/json" {
+ respondJson(w, params)
+ } else {
+ respondHtml(w, params)
+ }
+}
+
+//return a HTML page
+func respondHtml(w http.ResponseWriter, params *ErrorParams) {
+ err := params.template.Execute(w, params)
+ if err != nil {
+ log.Error(err.Error())
+ }
+}
+
+//return JSON
+func respondJson(w http.ResponseWriter, params *ErrorParams) {
+ w.Header().Set("Content-Type", "application/json")
+ json.NewEncoder(w).Encode(params)
+}
+
+//get the HTML template for a given code
+func getTemplate(code int) *template.Template {
+ if val, tmpl := templateMap[code]; tmpl {
+ return val
+ } else {
+ return templateMap[0]
+ }
+}
diff --git a/swarm/api/http/error_templates.go b/swarm/api/http/error_templates.go
new file mode 100644
index 000000000..29bd3bfbb
--- /dev/null
+++ b/swarm/api/http/error_templates.go
@@ -0,0 +1,376 @@
+// 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/>.
+
+/*
+We use html templates to handle simple but as informative as possible error pages.
+
+To eliminate circular dependency in case of an error, we don't store error pages on swarm.
+We can't save the error pages as html files on disk, or when deploying compiled binaries
+they won't be found.
+
+For this reason we resort to save the HTML error pages as strings, which then can be
+parsed by Go's html/template package
+*/
+package http
+
+//This returns the HTML for generic errors
+func GetGenericErrorPage() string {
+ page := `
+<html>
+
+ <head>
+ <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
+ <meta http-equiv="X-UA-Compatible" ww="chrome=1">
+ <meta name="description" content="Ethereum/Swarm error page">
+ <meta property="og:url" content="https://swarm-gateways.net/bzz:/theswarm.eth">
+
+ <style>
+
+ body, div, header, footer {
+ margin: 0;
+ padding: 0;
+ }
+
+ body {
+ overflow: hidden;
+ }
+
+ .container {
+ min-width: 100%;
+ min-height: 100%;
+ max-height: 100%;
+ }
+
+ header {
+ display: flex;
+ align-items: center;
+ background-color: #ffa500;
+ /* height: 20vh; */
+ padding: 5px;
+ }
+
+ .header-left, .header-right {
+ width: 20%;
+ }
+
+ .header-left {
+ padding-left: 40px;
+ float: left;
+ }
+
+ .header-right {
+ padding-right: 40px;
+ float: right;
+ }
+
+ .page-title {
+ /* margin-top: 4.5vh; */
+ text-align: center;
+ float: left;
+ width: 60%;
+ color: white;
+ }
+
+ content-body {
+ display: block;
+ margin: 0 auto;
+ /* width: 50%; */
+ min-height: 60vh;
+ max-height: 60vh;
+ padding: 50px 20px;
+ opacity: 0.6;
+ background-color: #A9F5BF;
+ }
+
+ table {
+ font-size: 1.2em;
+ margin: 0 auto;
+ }
+
+ tr {
+ height: 60px;
+ }
+
+ td {
+ text-align: center;
+ }
+
+ .key {
+ color: #111;
+ font-weight: bold;
+ width: 200px;
+ }
+
+ .value {
+ color: red;
+ font-weight: bold
+ }
+
+ footer {
+ height: 20vh;
+ background-color: #ffa500;
+ font-size: 1em;
+ text-align: center;
+ padding: 20px;
+ }
+
+ </style>
+
+ <title>Swarm::HTTP Error Page</title>
+ </head>
+
+
+ <body>
+ <div class="container">
+
+ <header>
+ <div class="header-left">
+ <img style="height:18vh;margin-left:40px" src="data:image/png;base64,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"/>
+ </div>
+ <div class="page-title">
+ <h1>There was a problem serving the requested page</h1>
+ </div>
+ <div class="header-right">
+ <div id="timestamp">{{.Timestamp}}</div>
+ </div>
+ </header>
+
+ <content-body>
+ <section>
+ <table>
+ <thead>
+ <td style="height: 150px; font-size: 1.3em; color: black; font-weight: bold">
+ Hmmmmm....Swarm was not able to serve your request!
+ </td>
+ </thead>
+ <tbody>
+ <tr>
+ <td class="key">
+ Error message:
+ </td>
+ </tr>
+ <tr>
+ <td class="value">
+ {{.Msg}}
+ </td>
+ </tr>
+
+ <tr>
+ <td class="key">
+ Error code:
+ </td>
+ </tr>
+ <tr>
+ <td class="value">
+ {{.Code}}
+ </td>
+ </tr>
+
+ </tbody>
+ </table>
+ </section>
+ </content-body>
+
+ <footer>
+ <p>
+ Swarm: Serverless Hosting Incentivised Peer-To-Peer Storage And Content Distribution<br/>
+ <a href="http://swarm-gateways.net/bzz:/theswarm.eth">Swarm</a>
+ </p>
+ </footer>
+
+
+ </div>
+ </body>
+
+</html>
+`
+ return page
+}
+
+//This returns the HTML for a 404 Not Found error
+func GetNotFoundErrorPage() string {
+ page := `
+<html>
+
+ <head>
+ <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
+ <meta http-equiv="X-UA-Compatible" ww="chrome=1">
+ <meta name="description" content="Ethereum/Swarm error page">
+ <meta property="og:url" content="https://swarm-gateways.net/bzz:/theswarm.eth">
+
+ <style>
+
+ body, div, header, footer {
+ margin: 0;
+ padding: 0;
+ }
+
+ body {
+ overflow: hidden;
+ }
+
+ .container {
+ min-width: 100%;
+ min-height: 100%;
+ max-height: 100%;
+ }
+
+ header {
+ display: flex;
+ align-items: center;
+ background-color: #ffa500;
+ /* height: 20vh; */
+ padding: 5px;
+ }
+
+ .header-left, .header-right {
+ width: 20%;
+ }
+
+ .header-left {
+ padding-left: 40px;
+ float: left;
+ }
+
+ .header-right {
+ padding-right: 40px;
+ float: right;
+ }
+
+ .page-title {
+ /* margin-top: 4.5vh; */
+ text-align: center;
+ float: left;
+ width: 60%;
+ color: white;
+ }
+
+ content-body {
+ display: block;
+ margin: 0 auto;
+ /* width: 50%; */
+ min-height: 60vh;
+ max-height: 60vh;
+ padding: 50px 20px;
+ opacity: 0.6;
+ background-color: #A9F5BF;
+ }
+
+ table {
+ font-size: 1.2em;
+ margin: 0 auto;
+ }
+
+ tr {
+ height: 60px;
+ }
+
+ td {
+ text-align: center;
+ }
+
+ .key {
+ color: #111;
+ font-weight: bold;
+ width: 200px;
+ }
+
+ .value {
+ color: red;
+ font-weight: bold
+ }
+
+ footer {
+ height: 20vh;
+ background-color: #ffa500;
+ font-size: 1em;
+ text-align: center;
+ padding: 20px;
+ }
+
+ </style>
+
+ <title>Swarm::404 HTTP Not Found</title>
+ </head>
+
+
+ <body>
+ <div class="container">
+
+ <header>
+ <div class="header-left">
+ <img style="height:18vh;margin-left:40px" src="data:image/png;base64,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"/>
+ </div>
+ <div class="page-title">
+ <h1>Resource Not Found</h1>
+ </div>
+ <div class="header-right">
+ <div id="timestamp">{{.Timestamp}}</div>
+ </div>
+ </header>
+
+ <content-body>
+ <section>
+ <table>
+ <thead>
+ <td style="height: 150px; font-size: 1.3em; color: black; font-weight: bold">
+ Unfortunately, the resource you were trying to access could not be found on swarm.
+ </td>
+ </thead>
+ <tbody>
+ <tr>
+ <td class="key">
+ </td>
+ </tr>
+ <tr>
+ <td class="value">
+ {{.Msg}}
+ </td>
+ </tr>
+
+ <tr>
+ <td class="key">
+ Error code:
+ </td>
+ </tr>
+ <tr>
+ <td class="value">
+ {{.Code}}
+ </td>
+ </tr>
+
+ </tbody>
+ </table>
+ </section>
+ </content-body>
+
+ <footer>
+ <p>
+ Swarm: Serverless Hosting Incentivised Peer-To-Peer Storage And Content Distribution<br/>
+ <a href="http://swarm-gateways.net/bzz:/theswarm.eth">Swarm</a>
+ </p>
+ </footer>
+
+
+ </div>
+ </body>
+
+</html>
+`
+ return page
+}
diff --git a/swarm/api/http/error_test.go b/swarm/api/http/error_test.go
new file mode 100644
index 000000000..465fbf4ca
--- /dev/null
+++ b/swarm/api/http/error_test.go
@@ -0,0 +1,143 @@
+// Copyright 2016 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_test
+
+import (
+ "encoding/json"
+ "golang.org/x/net/html"
+ "io/ioutil"
+ "net/http"
+ "strings"
+ "testing"
+
+ "github.com/ethereum/go-ethereum/swarm/testutil"
+)
+
+func TestError(t *testing.T) {
+
+ srv := testutil.NewTestSwarmServer(t)
+ defer srv.Close()
+
+ var resp *http.Response
+ var respbody []byte
+
+ url := srv.URL + "/this_should_fail_as_no_bzz_protocol_present"
+ resp, err := http.Get(url)
+
+ if err != nil {
+ t.Fatalf("Request failed: %v", err)
+ }
+ defer resp.Body.Close()
+ respbody, err = ioutil.ReadAll(resp.Body)
+
+ if resp.StatusCode != 400 && !strings.Contains(string(respbody), "Invalid URI "/this_should_fail_as_no_bzz_protocol_present": unknown scheme") {
+ t.Fatalf("Response body does not match, expected: %v, to contain: %v; received code %d, expected code: %d", string(respbody), "Invalid bzz URI: unknown scheme", 400, resp.StatusCode)
+ }
+
+ _, err = html.Parse(strings.NewReader(string(respbody)))
+ if err != nil {
+ t.Fatalf("HTML validation failed for error page returned!")
+ }
+}
+
+func Test404Page(t *testing.T) {
+ srv := testutil.NewTestSwarmServer(t)
+ defer srv.Close()
+
+ var resp *http.Response
+ var respbody []byte
+
+ url := srv.URL + "/bzz:/1234567890123456789012345678901234567890123456789012345678901234"
+ resp, err := http.Get(url)
+
+ if err != nil {
+ t.Fatalf("Request failed: %v", err)
+ }
+ defer resp.Body.Close()
+ respbody, err = ioutil.ReadAll(resp.Body)
+
+ if resp.StatusCode != 404 || !strings.Contains(string(respbody), "404") {
+ t.Fatalf("Invalid Status Code received, expected 404, got %d", resp.StatusCode)
+ }
+
+ _, err = html.Parse(strings.NewReader(string(respbody)))
+ if err != nil {
+ t.Fatalf("HTML validation failed for error page returned!")
+ }
+}
+
+func Test500Page(t *testing.T) {
+ srv := testutil.NewTestSwarmServer(t)
+ defer srv.Close()
+
+ var resp *http.Response
+ var respbody []byte
+
+ url := srv.URL + "/bzz:/thisShouldFailWith500Code"
+ resp, err := http.Get(url)
+
+ if err != nil {
+ t.Fatalf("Request failed: %v", err)
+ }
+ defer resp.Body.Close()
+ respbody, err = ioutil.ReadAll(resp.Body)
+
+ if resp.StatusCode != 500 || !strings.Contains(string(respbody), "500") {
+ t.Fatalf("Invalid Status Code received, expected 500, got %d", resp.StatusCode)
+ }
+
+ _, err = html.Parse(strings.NewReader(string(respbody)))
+ if err != nil {
+ t.Fatalf("HTML validation failed for error page returned!")
+ }
+}
+
+func TestJsonResponse(t *testing.T) {
+ srv := testutil.NewTestSwarmServer(t)
+ defer srv.Close()
+
+ var resp *http.Response
+ var respbody []byte
+
+ url := srv.URL + "/bzz:/thisShouldFailWith500Code/"
+ req, err := http.NewRequest("GET", url, nil)
+ if err != nil {
+ t.Fatalf("Request failed: %v", err)
+ }
+ req.Header.Set("Accept", "application/json")
+ resp, err = http.DefaultClient.Do(req)
+ if err != nil {
+ t.Fatalf("Request failed: %v", err)
+ }
+
+ defer resp.Body.Close()
+ respbody, err = ioutil.ReadAll(resp.Body)
+
+ if resp.StatusCode != 500 {
+ t.Fatalf("Invalid Status Code received, expected 500, got %d", resp.StatusCode)
+ }
+
+ if !isJSON(string(respbody)) {
+ t.Fatalf("Expected repsonse to be JSON, received invalid JSON: %s", string(respbody))
+ }
+
+}
+
+func isJSON(s string) bool {
+ var js map[string]interface{}
+ return json.Unmarshal([]byte(s), &js) == nil
+}
diff --git a/swarm/api/http/server.go b/swarm/api/http/server.go
index 0b4ec7e18..a637b8735 100644
--- a/swarm/api/http/server.go
+++ b/swarm/api/http/server.go
@@ -332,7 +332,7 @@ func (s *Server) HandleGetRaw(w http.ResponseWriter, r *Request) {
return api.SkipManifest
})
if entry == nil {
- http.NotFound(w, &r.Request)
+ s.NotFound(w, r, fmt.Errorf("Manifest entry could not be loaded"))
return
}
key = storage.Key(common.Hex2Bytes(entry.Hash))
@@ -341,8 +341,7 @@ func (s *Server) HandleGetRaw(w http.ResponseWriter, r *Request) {
// check the root chunk exists by retrieving the file's size
reader := s.api.Retrieve(key)
if _, err := reader.Size(nil); err != nil {
- s.logDebug("key not found %s: %s", key, err)
- http.NotFound(w, &r.Request)
+ s.NotFound(w, r, fmt.Errorf("Root chunk not found %s: %s", key, err))
return
}
@@ -534,16 +533,20 @@ func (s *Server) HandleGetFile(w http.ResponseWriter, r *Request) {
return
}
- reader, contentType, _, err := s.api.Get(key, r.uri.Path)
+ reader, contentType, status, err := s.api.Get(key, r.uri.Path)
if err != nil {
- s.Error(w, r, err)
+ switch status {
+ case http.StatusNotFound:
+ s.NotFound(w, r, err)
+ default:
+ s.Error(w, r, err)
+ }
return
}
// check the root chunk exists by retrieving the file's size
if _, err := reader.Size(nil); err != nil {
- s.logDebug("file not found %s: %s", r.uri, err)
- http.NotFound(w, &r.Request)
+ s.NotFound(w, r, fmt.Errorf("File not found %s: %s", r.uri, err))
return
}
@@ -556,14 +559,14 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
s.logDebug("HTTP %s request URL: '%s', Host: '%s', Path: '%s', Referer: '%s', Accept: '%s'", r.Method, r.RequestURI, r.URL.Host, r.URL.Path, r.Referer(), r.Header.Get("Accept"))
uri, err := api.Parse(strings.TrimLeft(r.URL.Path, "/"))
+ req := &Request{Request: *r, uri: uri}
if err != nil {
s.logError("Invalid URI %q: %s", r.URL.Path, err)
- http.Error(w, fmt.Sprintf("Invalid bzz URI: %s", err), http.StatusBadRequest)
+ s.BadRequest(w, req, fmt.Sprintf("Invalid URI %q: %s", r.URL.Path, err))
return
}
s.logDebug("%s request received for %s", r.Method, uri)
- req := &Request{Request: *r, uri: uri}
switch r.Method {
case "POST":
if uri.Raw() {
@@ -579,7 +582,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// strictly a traditional PUT request which replaces content
// at a URI, and POST is more ubiquitous)
if uri.Raw() {
- http.Error(w, fmt.Sprintf("No PUT to %s allowed.", uri), http.StatusBadRequest)
+ ShowError(w, r, fmt.Sprintf("No PUT to %s allowed.", uri), http.StatusBadRequest)
return
} else {
s.HandlePostFiles(w, req)
@@ -587,7 +590,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
case "DELETE":
if uri.Raw() {
- http.Error(w, fmt.Sprintf("No DELETE to %s allowed.", uri), http.StatusBadRequest)
+ ShowError(w, r, fmt.Sprintf("No DELETE to %s allowed.", uri), http.StatusBadRequest)
return
}
s.HandleDelete(w, req)
@@ -611,7 +614,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
s.HandleGetFile(w, req)
default:
- http.Error(w, "Method "+r.Method+" is not supported.", http.StatusMethodNotAllowed)
+ ShowError(w, r, fmt.Sprintf("Method "+r.Method+" is not supported.", uri), http.StatusMethodNotAllowed)
}
}
@@ -643,11 +646,13 @@ func (s *Server) logError(format string, v ...interface{}) {
}
func (s *Server) BadRequest(w http.ResponseWriter, r *Request, reason string) {
- s.logDebug("bad request %s %s: %s", r.Method, r.uri, reason)
- http.Error(w, reason, http.StatusBadRequest)
+ ShowError(w, &r.Request, fmt.Sprintf("Bad request %s %s: %s", r.Method, r.uri, reason), http.StatusBadRequest)
}
func (s *Server) Error(w http.ResponseWriter, r *Request, err error) {
- s.logError("error serving %s %s: %s", r.Method, r.uri, err)
- http.Error(w, err.Error(), http.StatusInternalServerError)
+ ShowError(w, &r.Request, fmt.Sprintf("Error serving %s %s: %s", r.Method, r.uri, err), http.StatusInternalServerError)
+}
+
+func (s *Server) NotFound(w http.ResponseWriter, r *Request, err error) {
+ ShowError(w, &r.Request, fmt.Sprintf("NOT FOUND error serving %s %s: %s", r.Method, r.uri, err), http.StatusNotFound)
}
diff --git a/swarm/api/http/server_test.go b/swarm/api/http/server_test.go
index d3374594b..ffeaf6e0d 100644
--- a/swarm/api/http/server_test.go
+++ b/swarm/api/http/server_test.go
@@ -22,6 +22,7 @@ import (
"fmt"
"io/ioutil"
"net/http"
+ "strings"
"sync"
"testing"
@@ -110,9 +111,9 @@ func TestBzzrGetPath(t *testing.T) {
}
nonhashresponses := []string{
- "error resolving name: no DNS to resolve name: \"name\"\n",
- "error resolving nonhash: immutable address not a content hash: \"nonhash\"\n",
- "error resolving nonhash: no DNS to resolve name: \"nonhash\"\n",
+ "error resolving name: no DNS to resolve name: "name"",
+ "error resolving nonhash: immutable address not a content hash: "nonhash"",
+ "error resolving nonhash: no DNS to resolve name: "nonhash"",
}
for i, url := range nonhashtests {
@@ -129,7 +130,7 @@ func TestBzzrGetPath(t *testing.T) {
if err != nil {
t.Fatalf("ReadAll failed: %v", err)
}
- if string(respbody) != nonhashresponses[i] {
+ if !strings.Contains(string(respbody), nonhashresponses[i]) {
t.Fatalf("Non-Hash response body does not match, expected: %v, got: %v", nonhashresponses[i], string(respbody))
}
}
--
cgit v1.2.3