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diff --git a/assets/history.tmpl b/assets/history.tmpl new file mode 100644 index 0000000..7b23587 --- /dev/null +++ b/assets/history.tmpl @@ -0,0 +1,52 @@ +{{ template "header" . }} + +
+ + + + + + + + + + + + + + + + {{ range $idx, $request := .History }} + + + + + + + + {{ end }} + +
IndexFilenameURLStatusActions
{{ $idx }} + {{ printf "%s/%s" $request.Subdir $request.Filename }} + + {{ $request.URL }} + + {{ printf "%v" $request.Status }} + {{ if $request.Error }} + {{ $request.Error }} + {{ end }} + + +
+ Delete + Resume + Stop + Retrieve +
+
+ +
+ + + +{{ template "footer" . }} diff --git a/assets/jquery-3.2.1.slim.min.js b/assets/jquery-3.2.1.slim.min.js new file mode 100644 index 0000000..105d00e --- /dev/null +++ b/assets/jquery-3.2.1.slim.min.js @@ -0,0 +1,4 @@ +/*! jQuery v3.2.1 -ajax,-ajax/jsonp,-ajax/load,-ajax/parseXML,-ajax/script,-ajax/var/location,-ajax/var/nonce,-ajax/var/rquery,-ajax/xhr,-manipulation/_evalUrl,-event/ajax,-effects,-effects/Tween,-effects/animatedSelector | (c) JS Foundation and other contributors | jquery.org/license */ +!function(a,b){"use strict";"object"==typeof module&&"object"==typeof module.exports?module.exports=a.document?b(a,!0):function(a){if(!a.document)throw new Error("jQuery requires a window with a document");return b(a)}:b(a)}("undefined"!=typeof window?window:this,function(a,b){"use strict";var c=[],d=a.document,e=Object.getPrototypeOf,f=c.slice,g=c.concat,h=c.push,i=c.indexOf,j={},k=j.toString,l=j.hasOwnProperty,m=l.toString,n=m.call(Object),o={};function p(a,b){b=b||d;var 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i;if(!F(e.instance.modifiers,'arrow','keepTogether'))return e;var n=o.element;if('string'==typeof n){if(n=e.instance.popper.querySelector(n),!n)return e;}else if(!e.instance.popper.contains(n))return console.warn('WARNING: `arrow.element` must be child of its popper element!'),e;var r=e.placement.split('-')[0],p=e.offsets,s=p.popper,d=p.reference,a=-1!==['left','right'].indexOf(r),l=a?'height':'width',f=a?'Top':'Left',m=f.toLowerCase(),h=a?'left':'top',g=a?'bottom':'right',u=L(n)[l];d[g]-us[g]&&(e.offsets.popper[m]+=d[m]+u-s[g]),e.offsets.popper=c(e.offsets.popper);var b=d[m]+d[l]/2-u/2,w=t(e.instance.popper),y=parseFloat(w['margin'+f],10),E=parseFloat(w['border'+f+'Width'],10),v=b-e.offsets.popper[m]-y-E;return v=J(_(s[l]-u,v),0),e.arrowElement=n,e.offsets.arrow=(i={},pe(i,m,Math.round(v)),pe(i,h,''),i),e},element:'[x-arrow]'},flip:{order:600,enabled:!0,fn:function(e,t){if(k(e.instance.modifiers,'inner'))return e;if(e.flipped&&e.placement===e.originalPlacement)return e;var o=y(e.instance.popper,e.instance.reference,t.padding,t.boundariesElement),i=e.placement.split('-')[0],n=x(i),r=e.placement.split('-')[1]||'',p=[];switch(t.behavior){case le.FLIP:p=[i,n];break;case le.CLOCKWISE:p=q(i);break;case le.COUNTERCLOCKWISE:p=q(i,!0);break;default:p=t.behavior;}return p.forEach(function(s,d){if(i!==s||p.length===d+1)return e;i=e.placement.split('-')[0],n=x(i);var a=e.offsets.popper,l=e.offsets.reference,f=X,m='left'===i&&f(a.right)>f(l.left)||'right'===i&&f(a.left)f(l.top)||'bottom'===i&&f(a.top)f(o.right),g=f(a.top)f(o.bottom),b='left'===i&&h||'right'===i&&c||'top'===i&&g||'bottom'===i&&u,w=-1!==['top','bottom'].indexOf(i),y=!!t.flipVariations&&(w&&'start'===r&&h||w&&'end'===r&&c||!w&&'start'===r&&g||!w&&'end'===r&&u);(m||b||y)&&(e.flipped=!0,(m||b)&&(i=p[d+1]),y&&(r=K(r)),e.placement=i+(r?'-'+r:''),e.offsets.popper=se({},e.offsets.popper,S(e.instance.popper,e.offsets.reference,e.placement)),e=C(e.instance.modifiers,e,'flip'))}),e},behavior:'flip',padding:5,boundariesElement:'viewport'},inner:{order:700,enabled:!1,fn:function(e){var t=e.placement,o=t.split('-')[0],i=e.offsets,n=i.popper,r=i.reference,p=-1!==['left','right'].indexOf(o),s=-1===['top','left'].indexOf(o);return n[p?'left':'top']=r[o]-(s?n[p?'width':'height']:0),e.placement=x(t),e.offsets.popper=c(n),e}},hide:{order:800,enabled:!0,fn:function(e){if(!F(e.instance.modifiers,'hide','preventOverflow'))return e;var t=e.offsets.reference,o=T(e.instance.modifiers,function(e){return'preventOverflow'===e.name}).boundaries;if(t.bottomo.right||t.top>o.bottom||t.right + + + + + + + + + + + + + + + + + {{ range $idx, $request := .Queue }} + + + + + + + + + {{ end }} + +
IndexFilenameURLStatusActionsProgress
{{ $idx }} + {{ printf "%s/%s" $request.Subdir $request.Filename }} + + {{ $request.URL }} + + {{ printf "%v" $request.Status }} + {{ if $request.Error }} + {{ $request.Error }} + {{ end }} + + +
+ Delete + Resume + Stop + Retrieve +
+ 		+
+
0{{ $request.Progress }}%
+
+
+ +
+ + + + +{{ template "footer" . }} diff --git a/bundle.go b/bundle.go new file mode 100644 index 0000000..56cc1a5 --- /dev/null +++ b/bundle.go @@ -0,0 +1,3 @@ +package main + +//go:generate sh -c "go run goembed.go -package bundled -var assets assets/history.tmpl assets/downloads.js assets/header.tmpl assets/footer.tmpl assets/queue.tmpl assets/status.tmpl assets/favicon.ico assets/bootstrap.min.css assets/bootstrap-table.min.css assets/bootstrap-table.min.js assets/bootstrap.min.js assets/popper.min.js assets/jquery-3.2.1.slim.min.js > bundled/GENERATED_bundled.go && gofmt -w bundled/GENERATED_bundled.go" diff --git a/bundled/bundled.go b/bundled/bundled.go new file mode 100644 index 0000000..9e3ab57 --- /dev/null +++ b/bundled/bundled.go @@ -0,0 +1,18 @@ +package bundled + +import ( + "bytes" + "net/http" + "time" +) + +func Asset(basename string) string { + return string(assets["assets/"+basename]) +} + +func HTTPHandlerFunc(basename string) http.Handler { + modTime := time.Now() + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + http.ServeContent(w, r, basename, modTime, bytes.NewReader(assets["assets/"+basename])) + }) +} diff --git a/downloader.go b/downloader.go index 8bbaa15..dde1a20 100644 --- a/downloader.go +++ b/downloader.go @@ -1,11 +1,16 @@ package main import ( + "bytes" + "context" "encoding/json" "errors" "fmt" + "html/template" + "io" "io/ioutil" "log" + "math" "mime" "net" "net/http" @@ -19,21 +24,23 @@ import ( "strings" "time" + "git.narnian.us/lordwelch/gloader/bundled" + "github.com/cavaliercoder/grab" "github.com/lordwelch/pathvalidate" + "github.com/wI2L/jettison" + "golang.org/x/net/publicsuffix" ) var ( - DefaultCookieJar = newCookieJar() - DefaultGrabClient = grab.NewClient() DefaultMaxActiveDownloads = 4 ErrUnsupportedScheme = errors.New("unsupported scheme") ) -type Priority uint8 -type Status uint8 +type Priority int +type Status int const ( Highest Priority = iota @@ -57,31 +64,33 @@ type Downloader struct { DownloadDir string CompleteDir string InfoDir string - Grab *grab.Client - Jar http.CookieJar MaxActiveDownloads int Server *http.Server Downloads RequestQueue History RequestQueue NewRequest chan Request requestDone chan *Request - OnComplete func(r Request) - OnAdd func(r Request) + OnComplete func(d *Downloader, r Request) + OnAdd func(d *Downloader, r Request) } type Request struct { URL string `json:"url"` Cookies []http.Cookie `json:"cookies"` ForceDownload bool `json:"forceDownload"` - Status Status `json:"Status"` + Status Status `json:"status"` Priority Priority `json:"priority"` FilePath string `json:"filepath"` Filename string `json:"filename"` Subdir string `json:"subdir"` TempPath string `json:"tempPath"` Response *grab.Response `json:"-"` - Error error `json:"-"` + Error string `json:"error"` + Err error `json:"-"` CompletedDate time.Time `json:"completedDate"` + Jar http.CookieJar `json:"-"` + Progress string `json:"progress,omitempty"` + grab *grab.Client } type RequestQueue struct { @@ -90,6 +99,97 @@ type RequestQueue struct { DateSort bool } +func (p Priority) MarshalJSON() ([]byte, error) { + var v string + switch p { + default: + v = "Medium" + case Medium: + v = "Medium" + case Low: + v = "Low" + case High: + v = "High" + case Highest: + v = "Highest" + } + return json.Marshal(v) +} + +func (p *Priority) UnmarshalJSON(b []byte) error { + var ( + v int + s string + ) + if err := json.Unmarshal(b, &v); err == nil { + *p = Priority(v) + return nil + } + if err := json.Unmarshal(b, &s); err != nil { + return err + } + switch strings.ToLower(s) { + default: + *p = Medium + case "medium": + *p = Medium + case "low": + *p = Low + case "high": + *p = High + case "highest": + *p = Highest + } + return nil +} + +func (s *Status) UnmarshalJSON(b []byte) error { + var v string + if err := json.Unmarshal(b, &v); err != nil { + return err + } + switch strings.ToLower(v) { + default: + *s = Queued + case "queued", "queue": + *s = Queued + case "complete", "completed": + *s = Complete + case "stop", "stopped": + *s = Stopped + case "download", "downloading": + *s = Downloading + case "error": + *s = Error + case "cancel", "canceled": + *s = Canceled + } + return nil +} + +func (s Status) MarshalJSON() ([]byte, error) { + return json.Marshal(s.String()) +} + +func (s Status) String() string { + switch s { + default: + return "Queued" + case Queued: + return "Queued" + case Complete: + return "Complete" + case Stopped: + return "Stopped" + case Downloading: + return "Downloading" + case Error: + return "Error" + case Canceled: + return "Canceled" + } +} + func (rq RequestQueue) Less(i, j int) bool { ii := 0 jj := 0 @@ -145,18 +245,47 @@ func (rq *RequestQueue) remove(r *Request) { } } +func (rq *RequestQueue) updateStatus() { + for _, req := range rq.Queue { + if req.Response != nil { + req.Progress = fmt.Sprintf("%.2f", math.Abs(req.Response.Progress()*100)) + } + } +} + +func (r *Request) setError(err error) { + if err != nil { + r.Status = Error + r.Err = err + r.Error = err.Error() + } else { + r.Status = Paused + r.Err = nil + r.Error = "" + } +} + +func (r Request) Delete() error { + var err, ret error + if r.Response != nil { + err = r.Response.Cancel() + if err != nil && err != context.Canceled { + ret = err + } + } + _ = os.Remove(r.TempPath) + err = os.Remove(r.FilePath) + if err != nil && err != os.ErrNotExist { + ret = err + } + return ret +} + func newCookieJar() http.CookieJar { c, _ := cookiejar.New(&cookiejar.Options{PublicSuffixList: publicsuffix.List}) return c } -func newDownloader() *Downloader { - return &Downloader{ - Jar: DefaultCookieJar, - Grab: DefaultGrabClient, - } -} - func (d *Downloader) Start(network, address string) { var ( listener net.Listener @@ -183,7 +312,6 @@ func (d *Downloader) Start(network, address string) { ReadTimeout: 2 * time.Minute, WriteTimeout: 2 * time.Minute, } - } if d.DataDir == "" { @@ -209,26 +337,17 @@ func (d *Downloader) Start(network, address string) { if err != nil { panic(err) } - log.Println("adding /add handler") - // mux.HandleFunc("/", d.UI) + log.Println("adding http handlers") + + d.initStatus(mux) mux.HandleFunc("/add", d.restAddDownload) - mux.HandleFunc("/queue", d.restQueueStatus) - mux.HandleFunc("/history", d.restHistoryStatus) - mux.HandleFunc("/start", d.restStartDownload) + mux.HandleFunc("/queued", d.restStatus(true)) + mux.HandleFunc("/completed", d.restStatus(false)) + mux.HandleFunc("/set", d.restSetDownloadStatus) + mux.HandleFunc("/delete", d.restDelete) + mux.Handle("/get/", http.StripPrefix("/get/", http.FileServer(http.Dir(d.CompleteDir)))) log.Println("starting main go routine") - d.Grab.HTTPClient = &http.Client{ - Jar: d.Jar, - Transport: &http.Transport{ - Dial: (&net.Dialer{ - Timeout: 10 * time.Second, - KeepAlive: 30 * time.Second, - }).Dial, - TLSHandshakeTimeout: 5 * time.Second, - ResponseHeaderTimeout: 5 * time.Second, - ExpectContinueTimeout: 1 * time.Second, - }, - } go d.download() @@ -236,64 +355,117 @@ func (d *Downloader) Start(network, address string) { _ = d.Server.Serve(listener) } -func (d *Downloader) restStartDownload(w http.ResponseWriter, r *http.Request) { +func httpMethodNotAllowed(w http.ResponseWriter, r *http.Request, method string) { + w.Header().Set("Content-Type", "text/plain; charset=utf-8") + w.Header().Set("X-Content-Type-Options", "nosniff") + w.Header().Add("Allow", method) + w.WriteHeader(http.StatusMethodNotAllowed) + fmt.Fprintf(w, "HTTP Error 405 – Method Not Allowed\nOnly %s method is allowed\n", method) + log.Printf("HTTP Error 405 – Method Not Allowed\nOnly %s method is allowed\n", method) +} + +func (d *Downloader) restDelete(w http.ResponseWriter, r *http.Request) { var ( err error - index struct { - index int + index []struct { + Index int + History bool } + ret []Request ) - if r.Method != http.MethodPost { - w.Header().Set("Content-Type", "text/plain; charset=utf-8") - w.Header().Set("X-Content-Type-Options", "nosniff") - w.Header().Add("Allow", http.MethodPost) - w.WriteHeader(http.StatusMethodNotAllowed) - fmt.Fprintln(w, "HTTP Error 405 – Method Not Allowed\nOnly POST method is allowed") - log.Println("HTTP Error 405 – Method Not Allowed\nOnly POST method is allowed") + if r.Method != http.MethodDelete { + httpMethodNotAllowed(w, r, http.MethodDelete) return } - err = json.NewDecoder(r.Body).Decode(index) + err = json.NewDecoder(r.Body).Decode(&index) if err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } - if index.index >= d.Downloads.Len() || index.index < 0 { - http.Error(w, fmt.Sprintf("slice index out of bounds. index: %d length of slice: %d", index.index, d.Downloads.Len()), http.StatusBadRequest) - return + sort.Slice(index, func(i, j int) bool { + return index[i].Index < index[j].Index + }) + for x, i := range index { + if i.History { + if i.Index >= d.History.Len() || i.Index < 0 { + http.Error(w, fmt.Sprintf("slice index out of bounds. index: %d length of slice: %d", i.Index, d.Downloads.Len()), http.StatusBadRequest) + return + } + ret = append(ret, *d.History.Pop(i.Index - x)) + ret[len(ret)-1].Delete() + } else { + if i.Index >= d.Downloads.Len() || i.Index < 0 { + http.Error(w, fmt.Sprintf("slice index out of bounds. index: %d length of slice: %d", i.Index, d.Downloads.Len()), http.StatusBadRequest) + return + } + ret = append(ret, *d.Downloads.Pop(i.Index - x)) + ret[len(ret)-1].Delete() + } } - d.startDownload(index.index) -} + d.syncDownloads() -func (d *Downloader) restHistoryStatus(w http.ResponseWriter, r *http.Request) { - if r.Method != http.MethodGet { - w.Header().Set("Content-Type", "text/plain; charset=utf-8") - w.Header().Set("X-Content-Type-Options", "nosniff") - w.Header().Add("Allow", http.MethodGet) - w.WriteHeader(http.StatusMethodNotAllowed) - fmt.Fprintln(w, "HTTP Error 405 – Method Not Allowed\nOnly GET method is allowed") - log.Println("HTTP Error 405 – Method Not Allowed\nOnly GET method is allowed") + v, err := jettison.MarshalOpts(ret, jettison.DenyList([]string{"cookies"})) + if err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) return } - j := json.NewEncoder(w) w.Header().Add("Content-Type", "application/json; charset=utf-8") w.WriteHeader(http.StatusOK) - j.Encode(d.History.Queue) + w.Write(v) } -func (d *Downloader) restQueueStatus(w http.ResponseWriter, r *http.Request) { - if r.Method != http.MethodGet { - w.Header().Set("Content-Type", "text/plain; charset=utf-8") - w.Header().Set("X-Content-Type-Options", "nosniff") - w.Header().Add("Allow", http.MethodGet) - w.WriteHeader(http.StatusMethodNotAllowed) - fmt.Fprintln(w, "HTTP Error 405 – Method Not Allowed\nOnly GET method is allowed") - log.Println("HTTP Error 405 – Method Not Allowed\nOnly GET method is allowed") +func (d *Downloader) restSetDownloadStatus(w http.ResponseWriter, r *http.Request) { + var ( + err error + index []struct { + Index int + Status Status + Priority Priority + } + ) + if r.Method != http.MethodPost { + httpMethodNotAllowed(w, r, http.MethodPost) return } - j := json.NewEncoder(w) - w.Header().Add("Content-Type", "application/json; charset=utf-8") - w.WriteHeader(http.StatusOK) - j.Encode(d.Downloads.Queue) + err = json.NewDecoder(r.Body).Decode(&index) + if err != nil { + http.Error(w, err.Error(), http.StatusBadRequest) + return + } + for _, i := range index { + if i.Index >= d.Downloads.Len() || i.Index < 0 { + http.Error(w, fmt.Sprintf("slice index out of bounds. index: %d length of slice: %d", i.Index, d.Downloads.Len()), http.StatusBadRequest) + return + } + r := d.Downloads.Queue[i.Index] + r.Priority = i.Priority + r.Status = i.Status + } + d.syncDownloads() +} + +func (d *Downloader) restStatus(q bool) func(http.ResponseWriter, *http.Request) { + return func(w http.ResponseWriter, r *http.Request) { + var queue = &d.History + if q { + d.Downloads.updateStatus() + queue = &d.Downloads + } + + if r.Method != http.MethodGet { + httpMethodNotAllowed(w, r, http.MethodGet) + return + } + queue.updateStatus() + v, err := jettison.MarshalOpts(queue.Queue, jettison.DenyList([]string{"cookies"})) + if err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) + return + } + w.Header().Add("Content-Type", "application/json; charset=utf-8") + w.WriteHeader(http.StatusOK) + w.Write(v) + } } func (d *Downloader) restAddDownload(w http.ResponseWriter, r *http.Request) { @@ -302,12 +474,7 @@ func (d *Downloader) restAddDownload(w http.ResponseWriter, r *http.Request) { err error ) if r.Method != http.MethodPost { - w.Header().Set("Content-Type", "text/plain; charset=utf-8") - w.Header().Set("X-Content-Type-Options", "nosniff") - w.Header().Add("Allow", http.MethodPost) - w.WriteHeader(http.StatusMethodNotAllowed) - fmt.Fprintln(w, "HTTP Error 405 – Method Not Allowed\nOnly POST method is allowed") - log.Println("HTTP Error 405 – Method Not Allowed\nOnly POST method is allowed") + httpMethodNotAllowed(w, r, http.MethodPost) return } // TODO fail only on individual requests @@ -334,8 +501,10 @@ func (d Downloader) getNameFromHEAD(r Request) string { re *http.Response p map[string]string ) + + r.insertCookies() ht := &http.Client{ - Jar: d.Jar, + Jar: r.Jar, Timeout: 30 * time.Second, Transport: &http.Transport{ Dial: (&net.Dialer{ @@ -464,14 +633,6 @@ func (d Downloader) FindRequest(u string) *Request { func (d *Downloader) addRequest(r *Request) { log.Println("adding download for", r.URL) req := d.FindRequest(r.URL) - u, _ := url.Parse(r.URL) - for i, v := range r.Cookies { - d.Jar.SetCookies(&url.URL{ - Scheme: u.Scheme, - Path: v.Path, - Host: v.Domain, - }, []*http.Cookie{&r.Cookies[i]}) - } d.getFilename(r) if req != nil { // url alread added @@ -502,20 +663,37 @@ func (d *Downloader) startDownload(i int) { err error ) r = d.Downloads.Queue[i] + r.insertCookies() d.getTempFilename(r) log.Println("starting download for", r.URL, "to", r.TempPath) // d.Downloads.Queue = append(d.Downloads.Queue, r) if r.Response == nil || r.Response.Err() != nil { req, err = grab.NewRequest(r.TempPath, r.URL) if err != nil { - r.Status = Error - r.Error = err + r.setError(err) return } } r.Status = Downloading - r.Response = d.Grab.Do(req) + if r.grab == nil { + r.grab = &grab.Client{ + HTTPClient: &http.Client{ + Jar: r.Jar, + Transport: &http.Transport{ + Dial: (&net.Dialer{ + Timeout: 10 * time.Second, + KeepAlive: 30 * time.Second, + }).Dial, + TLSHandshakeTimeout: 5 * time.Second, + ResponseHeaderTimeout: 5 * time.Second, + ExpectContinueTimeout: 1 * time.Second, + }, + }, + } + } + + r.Response = r.grab.Do(req) go func(r *Request) { log.Println("wait for download") log.Println(r.Response.IsComplete()) @@ -542,12 +720,43 @@ func (d *Downloader) syncDownloads() { return } sort.Stable(d.Downloads) + var downloadsMaxed bool // Start new downloads for i, req := range d.Downloads.Queue { - if d.MaxActiveDownloads >= len(d.getRunningDownloads()) { - if req.Status == Queued { + switch req.Status { + case Queued: + if !downloadsMaxed && d.MaxActiveDownloads >= len(d.getRunningDownloads()) { d.startDownload(i) } + case Stopped: + if req.Response != nil { + var err = req.Response.Cancel() + if err != nil && err != context.Canceled { + req.setError(err) + } + req.Response = nil + } + case Downloading: + if req.Response == nil { + d.startDownload(i) + } + case Error: + if req.Response != nil && req.Err == nil { + var err = req.Response.Err() + var err2 = req.Response.Cancel() + if err != nil && err2 != context.Canceled { + err = err2 + } + req.setError(err) + } + case Canceled: + if req.Response != nil { + err := req.Response.Cancel() + if err != nil && err != context.Canceled { + req.setError(err) + } + req.Response = nil + } } } @@ -558,6 +767,7 @@ func (d *Downloader) syncDownloads() { i-- } } + d.Downloads.updateStatus() } func (d *Downloader) requestCompleted(r *Request) { @@ -572,9 +782,8 @@ func (d *Downloader) requestCompleted(r *Request) { } d.History.Queue = append(d.History.Queue, r) } else { - r.Status = Error - r.Error = r.Response.Err() - log.Println("fucking error:", r.Error) + r.setError(r.Response.Err()) + log.Println("fucking error:", r.Err) } } @@ -585,17 +794,93 @@ func (d *Downloader) download() { d.syncDownloads() case r := <-d.NewRequest: + r.Progress = "" // not allowed when adding d.addRequest(&r) if d.OnAdd != nil { - d.OnAdd(r) + d.OnAdd(d, r) } case r := <-d.requestDone: log.Println("finishing request for", r.URL) d.requestCompleted(r) if d.OnComplete != nil { - d.OnComplete(*r) + d.OnComplete(d, *r) } } } } + +func (r *Request) insertCookies() { + if r.Jar == nil { + r.Jar = newCookieJar() + } + u, _ := url.Parse(r.URL) + for i, v := range r.Cookies { + r.Jar.SetCookies(&url.URL{ + Scheme: u.Scheme, + Path: v.Path, + Host: v.Domain, + }, []*http.Cookie{&r.Cookies[i]}) + } +} + +func (d *Downloader) initStatus(mux *http.ServeMux) { + commonTmpls := template.New("root").Funcs(map[string]interface{}{ + "shortenSHA256": func(hash string) string { + if len(hash) > 10 { + return hash[:10] + } + return hash + }, + }) + commonTmpls = template.Must(commonTmpls.New("header").Parse(bundled.Asset("header.tmpl"))) + commonTmpls = template.Must(commonTmpls.New("footer").Parse(bundled.Asset("footer.tmpl"))) + + queueTmpl := template.Must(template.Must(commonTmpls.Clone()).New("queueTmpl").Parse(bundled.Asset("queue.tmpl"))) + historyTmpl := template.Must(template.Must(commonTmpls.Clone()).New("historyTmpl").Parse(bundled.Asset("history.tmpl"))) + + for _, fn := range []string{ + "favicon.ico", + "bootstrap.min.js", + "bootstrap.min.css", + "bootstrap-table.min.js", + "bootstrap-table.min.css", + "popper.min.js", + "jquery-3.2.1.slim.min.js", + "downloads.js", + } { + mux.Handle("/"+fn, bundled.HTTPHandlerFunc(fn)) + } + mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { + var buf bytes.Buffer + d.Downloads.updateStatus() + if err := queueTmpl.Execute(&buf, struct { + Queue []*Request + History []*Request + Hostname string + }{ + Queue: d.Downloads.Queue, + History: d.History.Queue, + Hostname: "gloader", + }); err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) + } + io.Copy(w, &buf) + }) + mux.HandleFunc("/history", func(w http.ResponseWriter, r *http.Request) { + var buf bytes.Buffer + d.Downloads.updateStatus() + if err := historyTmpl.Execute(&buf, struct { + Queue []*Request + History []*Request + Hostname string + }{ + Queue: d.Downloads.Queue, + History: d.History.Queue, + Hostname: "gloader", + }); err != nil { + http.Error(w, err.Error(), http.StatusInternalServerError) + } + io.Copy(w, &buf) + }) +} diff --git a/go.mod b/go.mod index 3a9e3a2..3d6035f 100644 --- a/go.mod +++ b/go.mod @@ -8,5 +8,6 @@ require ( github.com/cavaliercoder/grab v2.0.0+incompatible github.com/lordwelch/pathvalidate v0.0.0-20201012043703-54efa7ea1308 github.com/u-root/u-root v7.0.0+incompatible + github.com/wI2L/jettison v0.7.1 golang.org/x/net v0.0.0-20201209123823-ac852fbbde11 ) diff --git a/goembed.go b/goembed.go new file mode 100644 index 0000000..de9f5e1 --- /dev/null +++ b/goembed.go @@ -0,0 +1,187 @@ +// +build ignore + +// goembed generates a Go source file from an input file. +package main + +import ( + "bufio" + "bytes" + "compress/gzip" + "flag" + "fmt" + "io" + "log" + "os" + "text/template" + "unicode/utf8" +) + +var ( + packageFlag = flag.String("package", "", "Go package name") + varFlag = flag.String("var", "", "Go var name") + gzipFlag = flag.Bool("gzip", false, "Whether to gzip contents") +) + +func main() { + flag.Parse() + + fmt.Printf("package %s\n\n", *packageFlag) + + if *gzipFlag { + err := gzipPrologue.Execute(os.Stdout, map[string]interface{}{ + "Args": flag.Args(), + "VarName": *varFlag, + }) + if err != nil { + log.Fatal(err) + } + } + + if flag.NArg() > 0 { + fmt.Println("// Table of contents") + fmt.Printf("var %v = map[string][]byte{\n", *varFlag) + for i, filename := range flag.Args() { + fmt.Printf("\t%q: %s_%d,\n", filename, *varFlag, i) + } + fmt.Println("}") + + // Using a separate variable for each []byte, instead of + // combining them into a single map literal, enables a storage + // optimization: the compiler places the data directly in the + // program's noptrdata section instead of the heap. + for i, filename := range flag.Args() { + if err := oneVar(fmt.Sprintf("%s_%d", *varFlag, i), filename); err != nil { + log.Fatal(err) + } + } + } else { + if err := oneVarReader(*varFlag, os.Stdin); err != nil { + log.Fatal(err) + } + } +} + +func oneVar(varName, filename string) error { + f, err := os.Open(filename) + if err != nil { + return err + } + defer f.Close() + return oneVarReader(varName, f) +} + +func oneVarReader(varName string, r io.Reader) error { + // Generate []byte() instead of []byte{}. + // The latter causes a memory explosion in the compiler (60 MB of input chews over 9 GB RAM). + // Doing a string conversion avoids some of that, but incurs a slight startup cost. + if !*gzipFlag { + fmt.Printf(`var %s = []byte("`, varName) + } else { + var buf bytes.Buffer + gzw, _ := gzip.NewWriterLevel(&buf, gzip.BestCompression) + if _, err := io.Copy(gzw, r); err != nil { + return err + } + if err := gzw.Close(); err != nil { + return err + } + fmt.Printf("var %s []byte // set in init\n\n", varName) + fmt.Printf(`var %s_gzip = []byte("`, varName) + r = &buf + } + + bufw := bufio.NewWriter(os.Stdout) + if _, err := io.Copy(&writer{w: bufw}, r); err != nil { + return err + } + if err := bufw.Flush(); err != nil { + return err + } + fmt.Println(`")`) + return nil +} + +type writer struct { + w io.Writer +} + +func (w *writer) Write(data []byte) (n int, err error) { + n = len(data) + + for err == nil && len(data) > 0 { + // https://golang.org/ref/spec#String_literals: "Within the quotes, any + // character may appear except newline and unescaped double quote. The + // text between the quotes forms the value of the literal, with backslash + // escapes interpreted as they are in rune literals […]." + switch b := data[0]; b { + case '\\': + _, err = w.w.Write([]byte(`\\`)) + case '"': + _, err = w.w.Write([]byte(`\"`)) + case '\n': + _, err = w.w.Write([]byte(`\n`)) + + case '\x00': + // https://golang.org/ref/spec#Source_code_representation: "Implementation + // restriction: For compatibility with other tools, a compiler may + // disallow the NUL character (U+0000) in the source text." + _, err = w.w.Write([]byte(`\x00`)) + + default: + // https://golang.org/ref/spec#Source_code_representation: "Implementation + // restriction: […] A byte order mark may be disallowed anywhere else in + // the source." + const byteOrderMark = '\uFEFF' + + if r, size := utf8.DecodeRune(data); r != utf8.RuneError && r != byteOrderMark { + _, err = w.w.Write(data[:size]) + data = data[size:] + continue + } + + _, err = fmt.Fprintf(w.w, `\x%02x`, b) + } + data = data[1:] + } + + return n - len(data), err +} + +var gzipPrologue = template.Must(template.New("").Parse(` +import ( + "bytes" + "compress/gzip" + "io/ioutil" +) +func init() { + var ( + r *gzip.Reader + err error + ) +{{ if gt (len .Args) 0 }} +{{ range $idx, $var := .Args }} +{{ $n := printf "%s_%d" $.VarName $idx }} + r, err = gzip.NewReader(bytes.NewReader({{ $n }}_gzip)) + if err != nil { + panic(err) + } + {{ $n }}, err = ioutil.ReadAll(r) + {{ $.VarName }}["{{ $var }}"] = {{ $n }} + r.Close() + if err != nil { + panic(err) + } +{{ end }} +{{ else }} + r, err = gzip.NewReader(bytes.NewReader({{ .VarName }}_gzip)) + if err != nil { + panic(err) + } + {{ .VarName }}, err = ioutil.ReadAll(r) + r.Close() + if err != nil { + panic(err) + } +{{ end }} +} +`)) diff --git a/grab/client.go b/grab/client.go index 51ee9c4..cc9ebbf 100644 --- a/grab/client.go +++ b/grab/client.go @@ -267,6 +267,7 @@ func (c *Client) validateLocal(resp *Response) stateFunc { if expectedSize >= 0 && expectedSize < resp.fi.Size() { // remote size is known, is smaller than local size and we want to resume + fmt.Fprintln(os.Stderr, "validate\n") resp.err = ErrBadLength return c.closeResponse } @@ -395,6 +396,7 @@ func (c *Client) readResponse(resp *Response) stateFunc { // remote size is known resp.sizeUnsafe += resp.bytesResumed if resp.Request.Size > 0 && resp.Request.Size != resp.sizeUnsafe { + fmt.Fprintln(os.Stderr, "response\n") resp.err = ErrBadLength return c.closeResponse } @@ -527,6 +529,7 @@ func (c *Client) copyFile(resp *Response) stateFunc { discoveredSize := resp.bytesResumed + bytesCopied atomic.StoreInt64(&resp.sizeUnsafe, discoveredSize) if resp.Request.Size > 0 && resp.Request.Size != discoveredSize { + fmt.Fprintln(os.Stderr, "file\n") resp.err = ErrBadLength return c.closeResponse } diff --git a/main.go b/main.go index 99601df..4c4646b 100644 --- a/main.go +++ b/main.go @@ -32,40 +32,42 @@ func main() { log.Println(err) os.Exit(1) } - d := newDownloader() - loadQueue(d) - save := func(r Request) { - var ( - content []byte - err error - ) - content, err = json.Marshal(d.History.Queue) - if err != nil { - log.Println(err) - return - } - err = ioutil.WriteFile(filepath.Join(gloaderHome, "history.json"), content, 0o666) - if err != nil { - log.Println(err) - return - } - content, err = json.Marshal(d.Downloads.Queue) - if err != nil { - log.Println(err) - return - } - err = ioutil.WriteFile(filepath.Join(gloaderHome, "queue.json"), content, 0o666) - if err != nil { - log.Println(err) - return - } + d := &Downloader{ + OnAdd: save, + OnComplete: save, + DataDir: filepath.Join(gloaderHome, "data"), } - d.OnAdd = save - d.OnComplete = save - d.DataDir = filepath.Join(gloaderHome, "data") + loadQueue(d) d.Start("tcp", ":8844") } +func save(d *Downloader, r Request) { + var ( + content []byte + err error + ) + content, err = json.Marshal(d.History.Queue) + if err != nil { + log.Println(err) + return + } + err = ioutil.WriteFile(filepath.Join(gloaderHome, "history.json"), content, 0o666) + if err != nil { + log.Println(err) + return + } + content, err = json.Marshal(d.Downloads.Queue) + if err != nil { + log.Println(err) + return + } + err = ioutil.WriteFile(filepath.Join(gloaderHome, "queue.json"), content, 0o666) + if err != nil { + log.Println(err) + return + } +} + func loadQueue(d *Downloader) { var ( f io.ReadCloser @@ -142,6 +144,10 @@ func mount() error { if err != nil { return fmt.Errorf("error mounting datadir: %w", err) } + err = syscall.Mount(dev.Path, dataDir, "ext4", syscall.MS_SHARED|syscall.MS_REMOUNT, "") + if err != nil { + return fmt.Errorf("error remounting datadir: %w", err) + } return nil } return fmt.Errorf("error mounting datadir: %w", err)