import (
"encoding/json"
- "fmt"
"html"
"html/template"
"io"
"net/http"
"net/url"
"os"
+ "path/filepath"
"sort"
"strconv"
"strings"
"sync"
- "git.curoverse.com/arvados.git/sdk/go/arvados"
- "git.curoverse.com/arvados.git/sdk/go/arvadosclient"
- "git.curoverse.com/arvados.git/sdk/go/auth"
- "git.curoverse.com/arvados.git/sdk/go/health"
- "git.curoverse.com/arvados.git/sdk/go/httpserver"
- "git.curoverse.com/arvados.git/sdk/go/keepclient"
+ "git.arvados.org/arvados.git/sdk/go/arvados"
+ "git.arvados.org/arvados.git/sdk/go/arvadosclient"
+ "git.arvados.org/arvados.git/sdk/go/auth"
+ "git.arvados.org/arvados.git/sdk/go/ctxlog"
+ "git.arvados.org/arvados.git/sdk/go/health"
+ "git.arvados.org/arvados.git/sdk/go/httpserver"
+ "git.arvados.org/arvados.git/sdk/go/keepclient"
+ "github.com/sirupsen/logrus"
"golang.org/x/net/webdav"
)
type handler struct {
Config *Config
+ MetricsAPI http.Handler
clientPool *arvadosclient.ClientPool
setupOnce sync.Once
healthHandler http.Handler
}
func (h *handler) setup() {
- h.clientPool = arvadosclient.MakeClientPool()
+ // Errors will be handled at the client pool.
+ arv, _ := arvados.NewClientFromConfig(h.Config.cluster)
+ h.clientPool = arvadosclient.MakeClientPoolWith(arv)
keepclient.RefreshServiceDiscoveryOnSIGHUP()
+ keepclient.DefaultBlockCache.MaxBlocks = h.Config.cluster.Collections.WebDAVCache.MaxBlockEntries
h.healthHandler = &health.Handler{
- Token: h.Config.ManagementToken,
+ Token: h.Config.cluster.ManagementToken,
Prefix: "/_health/",
}
}
func (h *handler) serveStatus(w http.ResponseWriter, r *http.Request) {
- status := struct {
- cacheStats
- }{
- cacheStats: h.Config.Cache.Stats(),
+ json.NewEncoder(w).Encode(struct{ Version string }{version})
+}
+
+// updateOnSuccess wraps httpserver.ResponseWriter. If the handler
+// sends an HTTP header indicating success, updateOnSuccess first
+// calls the provided update func. If the update func fails, a 500
+// response is sent, and the status code and body sent by the handler
+// are ignored (all response writes return the update error).
+type updateOnSuccess struct {
+ httpserver.ResponseWriter
+ logger logrus.FieldLogger
+ update func() error
+ sentHeader bool
+ err error
+}
+
+func (uos *updateOnSuccess) Write(p []byte) (int, error) {
+ if !uos.sentHeader {
+ uos.WriteHeader(http.StatusOK)
+ }
+ if uos.err != nil {
+ return 0, uos.err
+ }
+ return uos.ResponseWriter.Write(p)
+}
+
+func (uos *updateOnSuccess) WriteHeader(code int) {
+ if !uos.sentHeader {
+ uos.sentHeader = true
+ if code >= 200 && code < 400 {
+ if uos.err = uos.update(); uos.err != nil {
+ code := http.StatusInternalServerError
+ if err, ok := uos.err.(*arvados.TransactionError); ok {
+ code = err.StatusCode
+ }
+ uos.logger.WithError(uos.err).Errorf("update() returned error type %T, changing response to HTTP %d", uos.err, code)
+ http.Error(uos.ResponseWriter, uos.err.Error(), code)
+ return
+ }
+ }
}
- json.NewEncoder(w).Encode(status)
+ uos.ResponseWriter.WriteHeader(code)
}
var (
+ corsAllowHeadersHeader = strings.Join([]string{
+ "Authorization", "Content-Type", "Range",
+ // WebDAV request headers:
+ "Depth", "Destination", "If", "Lock-Token", "Overwrite", "Timeout",
+ }, ", ")
+ writeMethod = map[string]bool{
+ "COPY": true,
+ "DELETE": true,
+ "LOCK": true,
+ "MKCOL": true,
+ "MOVE": true,
+ "PROPPATCH": true,
+ "PUT": true,
+ "RMCOL": true,
+ "UNLOCK": true,
+ }
webdavMethod = map[string]bool{
- "OPTIONS": true,
- "PROPFIND": true,
+ "COPY": true,
+ "DELETE": true,
+ "LOCK": true,
+ "MKCOL": true,
+ "MOVE": true,
+ "OPTIONS": true,
+ "PROPFIND": true,
+ "PROPPATCH": true,
+ "PUT": true,
+ "RMCOL": true,
+ "UNLOCK": true,
}
browserMethod = map[string]bool{
"GET": true,
"HEAD": true,
"POST": true,
}
+ // top-level dirs to serve with siteFS
+ siteFSDir = map[string]bool{
+ "": true, // root directory
+ "by_id": true,
+ "users": true,
+ }
)
// ServeHTTP implements http.Handler.
func (h *handler) ServeHTTP(wOrig http.ResponseWriter, r *http.Request) {
h.setupOnce.Do(h.setup)
- var statusCode = 0
- var statusText string
-
- remoteAddr := r.RemoteAddr
- if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
- remoteAddr = xff + "," + remoteAddr
+ if xfp := r.Header.Get("X-Forwarded-Proto"); xfp != "" && xfp != "http" {
+ r.URL.Scheme = xfp
}
w := httpserver.WrapResponseWriter(wOrig)
- defer func() {
- if statusCode == 0 {
- statusCode = w.WroteStatus()
- } else if w.WroteStatus() == 0 {
- w.WriteHeader(statusCode)
- } else if w.WroteStatus() != statusCode {
- httpserver.Log(r.RemoteAddr, "WARNING",
- fmt.Sprintf("Our status changed from %d to %d after we sent headers", w.WroteStatus(), statusCode))
- }
- if statusText == "" {
- statusText = http.StatusText(statusCode)
- }
- httpserver.Log(remoteAddr, statusCode, statusText, w.WroteBodyBytes(), r.Method, r.Host, r.URL.Path, r.URL.RawQuery)
- }()
if strings.HasPrefix(r.URL.Path, "/_health/") && r.Method == "GET" {
h.healthHandler.ServeHTTP(w, r)
if method := r.Header.Get("Access-Control-Request-Method"); method != "" && r.Method == "OPTIONS" {
if !browserMethod[method] && !webdavMethod[method] {
- statusCode = http.StatusMethodNotAllowed
+ w.WriteHeader(http.StatusMethodNotAllowed)
return
}
- w.Header().Set("Access-Control-Allow-Headers", "Authorization, Content-Type, Range")
- w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS, PROPFIND")
+ w.Header().Set("Access-Control-Allow-Headers", corsAllowHeadersHeader)
+ w.Header().Set("Access-Control-Allow-Methods", "COPY, DELETE, GET, LOCK, MKCOL, MOVE, OPTIONS, POST, PROPFIND, PROPPATCH, PUT, RMCOL, UNLOCK")
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Max-Age", "86400")
- statusCode = http.StatusOK
return
}
if !browserMethod[r.Method] && !webdavMethod[r.Method] {
- statusCode, statusText = http.StatusMethodNotAllowed, r.Method
+ w.WriteHeader(http.StatusMethodNotAllowed)
return
}
w.Header().Set("Access-Control-Expose-Headers", "Content-Range")
}
- arv := h.clientPool.Get()
- if arv == nil {
- statusCode, statusText = http.StatusInternalServerError, "Pool failed: "+h.clientPool.Err().Error()
+ if h.serveS3(w, r) {
return
}
- defer h.clientPool.Put(arv)
pathParts := strings.Split(r.URL.Path[1:], "/")
var stripParts int
- var targetID string
+ var collectionID string
var tokens []string
var reqTokens []string
var pathToken bool
var attachment bool
- credentialsOK := h.Config.TrustAllContent
+ var useSiteFS bool
+ credentialsOK := h.Config.cluster.Collections.TrustAllContent
- if r.Host != "" && r.Host == h.Config.AttachmentOnlyHost {
+ if r.Host != "" && r.Host == h.Config.cluster.Services.WebDAVDownload.ExternalURL.Host {
credentialsOK = true
attachment = true
} else if r.FormValue("disposition") == "attachment" {
attachment = true
}
- if targetID = parseCollectionIDFromDNSName(r.Host); targetID != "" {
+ if collectionID = parseCollectionIDFromDNSName(r.Host); collectionID != "" {
// http://ID.collections.example/PATH...
credentialsOK = true
} else if r.URL.Path == "/status.json" {
h.serveStatus(w, r)
return
+ } else if strings.HasPrefix(r.URL.Path, "/metrics") {
+ h.MetricsAPI.ServeHTTP(w, r)
+ return
+ } else if siteFSDir[pathParts[0]] {
+ useSiteFS = true
} else if len(pathParts) >= 1 && strings.HasPrefix(pathParts[0], "c=") {
// /c=ID[/PATH...]
- targetID = parseCollectionIDFromURL(pathParts[0][2:])
+ collectionID = parseCollectionIDFromURL(pathParts[0][2:])
stripParts = 1
} else if len(pathParts) >= 2 && pathParts[0] == "collections" {
if len(pathParts) >= 4 && pathParts[1] == "download" {
// /collections/download/ID/TOKEN/PATH...
- targetID = parseCollectionIDFromURL(pathParts[2])
+ collectionID = parseCollectionIDFromURL(pathParts[2])
tokens = []string{pathParts[3]}
stripParts = 4
pathToken = true
} else {
// /collections/ID/PATH...
- targetID = parseCollectionIDFromURL(pathParts[1])
- tokens = h.Config.AnonymousTokens
+ collectionID = parseCollectionIDFromURL(pathParts[1])
stripParts = 2
+ // This path is only meant to work for public
+ // data. Tokens provided with the request are
+ // ignored.
+ credentialsOK = false
}
}
- if targetID == "" {
- statusCode = http.StatusNotFound
+ if collectionID == "" && !useSiteFS {
+ w.WriteHeader(http.StatusNotFound)
return
}
+ forceReload := false
+ if cc := r.Header.Get("Cache-Control"); strings.Contains(cc, "no-cache") || strings.Contains(cc, "must-revalidate") {
+ forceReload = true
+ }
+
+ if credentialsOK {
+ reqTokens = auth.CredentialsFromRequest(r).Tokens
+ }
+
formToken := r.FormValue("api_token")
if formToken != "" && r.Header.Get("Origin") != "" && attachment && r.URL.Query().Get("api_token") == "" {
// The client provided an explicit token in the POST
//
// * The token isn't embedded in the URL, so we don't
// need to worry about bookmarks and copy/paste.
- tokens = append(tokens, formToken)
+ reqTokens = append(reqTokens, formToken)
} else if formToken != "" && browserMethod[r.Method] {
// The client provided an explicit token in the query
// string, or a form in POST body. We must put the
return
}
+ if useSiteFS {
+ h.serveSiteFS(w, r, reqTokens, credentialsOK, attachment)
+ return
+ }
+
targetPath := pathParts[stripParts:]
if tokens == nil && len(targetPath) > 0 && strings.HasPrefix(targetPath[0], "t=") {
// http://ID.example/t=TOKEN/PATH...
}
if tokens == nil {
- if credentialsOK {
- reqTokens = auth.NewCredentialsFromHTTPRequest(r).Tokens
- }
- tokens = append(reqTokens, h.Config.AnonymousTokens...)
+ tokens = append(reqTokens, h.Config.cluster.Users.AnonymousUserToken)
}
if len(targetPath) > 0 && targetPath[0] == "_" {
stripParts++
}
- forceReload := false
- if cc := r.Header.Get("Cache-Control"); strings.Contains(cc, "no-cache") || strings.Contains(cc, "must-revalidate") {
- forceReload = true
+ arv := h.clientPool.Get()
+ if arv == nil {
+ http.Error(w, "client pool error: "+h.clientPool.Err().Error(), http.StatusInternalServerError)
+ return
}
+ defer h.clientPool.Put(arv)
var collection *arvados.Collection
tokenResult := make(map[string]int)
for _, arv.ApiToken = range tokens {
var err error
- collection, err = h.Config.Cache.Get(arv, targetID, forceReload)
+ collection, err = h.Config.Cache.Get(arv, collectionID, forceReload)
if err == nil {
// Success
break
}
}
// Something more serious is wrong
- statusCode, statusText = http.StatusInternalServerError, err.Error()
+ http.Error(w, "cache error: "+err.Error(), http.StatusInternalServerError)
return
}
if collection == nil {
// for additional credentials would just be
// confusing), or we don't even accept
// credentials at this path.
- statusCode = http.StatusNotFound
+ w.WriteHeader(http.StatusNotFound)
return
}
for _, t := range reqTokens {
if tokenResult[t] == 404 {
// The client provided valid token(s), but the
// collection was not found.
- statusCode = http.StatusNotFound
+ w.WriteHeader(http.StatusNotFound)
return
}
}
// data that has been deleted. Allow a referrer to
// provide this context somehow?
w.Header().Add("WWW-Authenticate", "Basic realm=\"collections\"")
- statusCode = http.StatusUnauthorized
+ w.WriteHeader(http.StatusUnauthorized)
return
}
kc, err := keepclient.MakeKeepClient(arv)
if err != nil {
- statusCode, statusText = http.StatusInternalServerError, err.Error()
+ http.Error(w, "error setting up keep client: "+err.Error(), http.StatusInternalServerError)
return
}
+ kc.RequestID = r.Header.Get("X-Request-Id")
var basename string
if len(targetPath) > 0 {
}
applyContentDispositionHdr(w, r, basename, attachment)
- fs := collection.FileSystem(&arvados.Client{
+ client := (&arvados.Client{
APIHost: arv.ApiServer,
AuthToken: arv.ApiToken,
Insecure: arv.ApiInsecure,
- }, kc)
+ }).WithRequestID(r.Header.Get("X-Request-Id"))
+
+ fs, err := collection.FileSystem(client, kc)
+ if err != nil {
+ http.Error(w, "error creating collection filesystem: "+err.Error(), http.StatusInternalServerError)
+ return
+ }
+
+ writefs, writeOK := fs.(arvados.CollectionFileSystem)
+ targetIsPDH := arvadosclient.PDHMatch(collectionID)
+ if (targetIsPDH || !writeOK) && writeMethod[r.Method] {
+ http.Error(w, errReadOnly.Error(), http.StatusMethodNotAllowed)
+ return
+ }
+
if webdavMethod[r.Method] {
+ if writeMethod[r.Method] {
+ // Save the collection only if/when all
+ // webdav->filesystem operations succeed --
+ // and send a 500 error if the modified
+ // collection can't be saved.
+ w = &updateOnSuccess{
+ ResponseWriter: w,
+ logger: ctxlog.FromContext(r.Context()),
+ update: func() error {
+ return h.Config.Cache.Update(client, *collection, writefs)
+ }}
+ }
h := webdav.Handler{
- Prefix: "/" + strings.Join(pathParts[:stripParts], "/"),
- FileSystem: &webdavFS{collfs: fs},
+ Prefix: "/" + strings.Join(pathParts[:stripParts], "/"),
+ FileSystem: &webdavFS{
+ collfs: fs,
+ writing: writeMethod[r.Method],
+ alwaysReadEOF: r.Method == "PROPFIND",
+ },
LockSystem: h.webdavLS,
Logger: func(_ *http.Request, err error) {
- if os.IsNotExist(err) {
- statusCode, statusText = http.StatusNotFound, err.Error()
- } else if err != nil {
- statusCode, statusText = http.StatusInternalServerError, err.Error()
+ if err != nil {
+ ctxlog.FromContext(r.Context()).WithError(err).Error("error reported by webdav handler")
}
},
}
openPath := "/" + strings.Join(targetPath, "/")
if f, err := fs.Open(openPath); os.IsNotExist(err) {
// Requested non-existent path
- statusCode = http.StatusNotFound
+ w.WriteHeader(http.StatusNotFound)
} else if err != nil {
// Some other (unexpected) error
- statusCode, statusText = http.StatusInternalServerError, err.Error()
+ http.Error(w, "open: "+err.Error(), http.StatusInternalServerError)
} else if stat, err := f.Stat(); err != nil {
// Can't get Size/IsDir (shouldn't happen with a collectionFS!)
- statusCode, statusText = http.StatusInternalServerError, err.Error()
+ http.Error(w, "stat: "+err.Error(), http.StatusInternalServerError)
} else if stat.IsDir() && !strings.HasSuffix(r.URL.Path, "/") {
// If client requests ".../dirname", redirect to
// ".../dirname/". This way, relative links in the
// "dirname/fnm".
h.seeOtherWithCookie(w, r, r.URL.Path+"/", credentialsOK)
} else if stat.IsDir() {
- h.serveDirectory(w, r, collection.Name, fs, openPath, stripParts)
+ h.serveDirectory(w, r, collection.Name, fs, openPath, true)
} else {
http.ServeContent(w, r, basename, stat.ModTime(), f)
- if r.Header.Get("Range") == "" && int64(w.WroteBodyBytes()) != stat.Size() {
+ if wrote := int64(w.WroteBodyBytes()); wrote != stat.Size() && r.Header.Get("Range") == "" {
// If we wrote fewer bytes than expected, it's
// too late to change the real response code
// or send an error message to the client, but
// at least we can try to put some useful
// debugging info in the logs.
n, err := f.Read(make([]byte, 1024))
- statusCode, statusText = http.StatusInternalServerError, fmt.Sprintf("f.Size()==%d but only wrote %d bytes; read(1024) returns %d, %s", stat.Size(), w.WroteBodyBytes(), n, err)
+ ctxlog.FromContext(r.Context()).Errorf("stat.Size()==%d but only wrote %d bytes; read(1024) returns %d, %s", stat.Size(), wrote, n, err)
}
}
}
+func (h *handler) getClients(reqID, token string) (arv *arvadosclient.ArvadosClient, kc *keepclient.KeepClient, client *arvados.Client, release func(), err error) {
+ arv = h.clientPool.Get()
+ if arv == nil {
+ return nil, nil, nil, nil, err
+ }
+ release = func() { h.clientPool.Put(arv) }
+ arv.ApiToken = token
+ kc, err = keepclient.MakeKeepClient(arv)
+ if err != nil {
+ release()
+ return
+ }
+ kc.RequestID = reqID
+ client = (&arvados.Client{
+ APIHost: arv.ApiServer,
+ AuthToken: arv.ApiToken,
+ Insecure: arv.ApiInsecure,
+ }).WithRequestID(reqID)
+ return
+}
+
+func (h *handler) serveSiteFS(w http.ResponseWriter, r *http.Request, tokens []string, credentialsOK, attachment bool) {
+ if len(tokens) == 0 {
+ w.Header().Add("WWW-Authenticate", "Basic realm=\"collections\"")
+ http.Error(w, http.StatusText(http.StatusUnauthorized), http.StatusUnauthorized)
+ return
+ }
+ if writeMethod[r.Method] {
+ http.Error(w, errReadOnly.Error(), http.StatusMethodNotAllowed)
+ return
+ }
+ _, kc, client, release, err := h.getClients(r.Header.Get("X-Request-Id"), tokens[0])
+ if err != nil {
+ http.Error(w, "Pool failed: "+h.clientPool.Err().Error(), http.StatusInternalServerError)
+ return
+ }
+ defer release()
+
+ fs := client.SiteFileSystem(kc)
+ fs.ForwardSlashNameSubstitution(h.Config.cluster.Collections.ForwardSlashNameSubstitution)
+ f, err := fs.Open(r.URL.Path)
+ if os.IsNotExist(err) {
+ http.Error(w, err.Error(), http.StatusNotFound)
+ return
+ } else if err != nil {
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ return
+ }
+ defer f.Close()
+ if fi, err := f.Stat(); err == nil && fi.IsDir() && r.Method == "GET" {
+ if !strings.HasSuffix(r.URL.Path, "/") {
+ h.seeOtherWithCookie(w, r, r.URL.Path+"/", credentialsOK)
+ } else {
+ h.serveDirectory(w, r, fi.Name(), fs, r.URL.Path, false)
+ }
+ return
+ }
+ if r.Method == "GET" {
+ _, basename := filepath.Split(r.URL.Path)
+ applyContentDispositionHdr(w, r, basename, attachment)
+ }
+ wh := webdav.Handler{
+ Prefix: "/",
+ FileSystem: &webdavFS{
+ collfs: fs,
+ writing: writeMethod[r.Method],
+ alwaysReadEOF: r.Method == "PROPFIND",
+ },
+ LockSystem: h.webdavLS,
+ Logger: func(_ *http.Request, err error) {
+ if err != nil {
+ ctxlog.FromContext(r.Context()).WithError(err).Error("error reported by webdav handler")
+ }
+ },
+ }
+ wh.ServeHTTP(w, r)
+}
+
var dirListingTemplate = `<!DOCTYPE HTML>
<HTML><HEAD>
<META name="robots" content="NOINDEX">
- <TITLE>{{ .Collection.Name }}</TITLE>
+ <TITLE>{{ .CollectionName }}</TITLE>
<STYLE type="text/css">
body {
margin: 1.5em;
</STYLE>
</HEAD>
<BODY>
+
<H1>{{ .CollectionName }}</H1>
<P>This collection of data files is being shared with you through
Arvados. You can download individual files listed below. To download
-the entire collection with wget, try:</P>
+the entire directory tree with wget, try:</P>
-<PRE>$ wget --mirror --no-parent --no-host --cut-dirs={{ .StripParts }} https://{{ .Request.Host }}{{ .Request.URL }}</PRE>
+<PRE>$ wget --mirror --no-parent --no-host --cut-dirs={{ .StripParts }} https://{{ .Request.Host }}{{ .Request.URL.Path }}</PRE>
<H2>File Listing</H2>
{{if .Files}}
<UL>
-{{range .Files}} <LI>{{.Size | printf "%15d " | nbsp}}<A href="{{.Name}}">{{.Name}}</A></LI>{{end}}
+{{range .Files}}
+{{if .IsDir }}
+ <LI>{{" " | printf "%15s " | nbsp}}<A href="{{print "./" .Name}}/">{{.Name}}/</A></LI>
+{{else}}
+ <LI>{{.Size | printf "%15d " | nbsp}}<A href="{{print "./" .Name}}">{{.Name}}</A></LI>
+{{end}}
+{{end}}
</UL>
{{else}}
<P>(No files; this collection is empty.)</P>
`
type fileListEnt struct {
- Name string
- Size int64
+ Name string
+ Size int64
+ IsDir bool
}
-func (h *handler) serveDirectory(w http.ResponseWriter, r *http.Request, collectionName string, fs http.FileSystem, base string, stripParts int) {
+func (h *handler) serveDirectory(w http.ResponseWriter, r *http.Request, collectionName string, fs http.FileSystem, base string, recurse bool) {
var files []fileListEnt
var walk func(string) error
if !strings.HasSuffix(base, "/") {
return err
}
for _, ent := range ents {
- if ent.IsDir() {
+ if recurse && ent.IsDir() {
err = walk(path + ent.Name() + "/")
if err != nil {
return err
}
} else {
files = append(files, fileListEnt{
- Name: path + ent.Name(),
- Size: ent.Size(),
+ Name: path + ent.Name(),
+ Size: ent.Size(),
+ IsDir: ent.IsDir(),
})
}
}
return nil
}
if err := walk(""); err != nil {
- http.Error(w, err.Error(), http.StatusInternalServerError)
+ http.Error(w, "error getting directory listing: "+err.Error(), http.StatusInternalServerError)
return
}
}
tmpl, err := template.New("dir").Funcs(funcs).Parse(dirListingTemplate)
if err != nil {
- http.Error(w, err.Error(), http.StatusInternalServerError)
+ http.Error(w, "error parsing template: "+err.Error(), http.StatusInternalServerError)
return
}
sort.Slice(files, func(i, j int) bool {
"CollectionName": collectionName,
"Files": files,
"Request": r,
- "StripParts": stripParts,
+ "StripParts": strings.Count(strings.TrimRight(r.URL.Path, "/"), "/"),
})
}
// into a cookie unless the current vhost
// (origin) serves only a single collection or
// we are in TrustAllContent mode.
- w.WriteHeader(http.StatusBadRequest)
+ http.Error(w, "cannot serve inline content at this URL (possible configuration error; see https://doc.arvados.org/install/install-keep-web.html#dns)", http.StatusBadRequest)
return
}
if location != "" {
newu, err := u.Parse(location)
if err != nil {
- w.WriteHeader(http.StatusInternalServerError)
+ http.Error(w, "error resolving redirect target: "+err.Error(), http.StatusInternalServerError)
return
}
u = newu
}
redir := (&url.URL{
+ Scheme: r.URL.Scheme,
Host: r.Host,
Path: u.Path,
RawQuery: redirQuery.Encode(),