client/webserver: Download log files from UI button.

.gitignore

@@ -49,3 +49,4 @@ client/cmd/translationsreport/translationsreport
 client/cmd/translationsreport/worksheets
 server/cmd/dexadm/dexadm
 server/cmd/geogame/geogame
+client/cmd/bisonw/bwlog.zip

client/app/config.go

@@ -185,17 +185,18 @@ func (cfg *Config) Web(c *core.Core, mm *mm.MarketMaker, log dex.Logger, utc boo
 	}
 
 	return &webserver.Config{
-		Core:          c,
-		MarketMaker:   mmCore,
-		Addr:          cfg.WebAddr,
-		CustomSiteDir: cfg.SiteDir,
-		Logger:        log,
-		UTC:           utc,
-		CertFile:      certFile,
-		KeyFile:       keyFile,
-		NoEmbed:       cfg.NoEmbedSite,
-		HttpProf:      cfg.HTTPProfile,
-		Language:      cfg.Language,
+		Core:            c,
+		MarketMaker:     mmCore,
+		Addr:            cfg.WebAddr,
+		CustomSiteDir:   cfg.SiteDir,
+		Logger:          log,
+		UTC:             utc,
+		CertFile:        certFile,
+		KeyFile:         keyFile,
+		NoEmbed:         cfg.NoEmbedSite,
+		HttpProf:        cfg.HTTPProfile,
+		Language:        cfg.Language,
+		MainLogFilePath: cfg.LogPath,
 	}
 }
 

client/webserver/api.go

@@ -4,11 +4,14 @@
 package webserver
 
 import (
+	"archive/zip"
 	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"net/http"
+	"os"
 	"time"
 
 	"decred.org/dcrdex/client/asset"
@@ -2040,6 +2043,34 @@ func (s *WebServer) apiTakeAction(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, simpleAck())
 }
 
+// apiExportAppLogs zips the application log and sends it back to the browser.
+func (s *WebServer) apiExportAppLogs(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Disposition", "attachment; filename=bwlog.zip")
+	w.Header().Set("Content-Type", "application/octet-stream; type=zip")
+	w.WriteHeader(http.StatusOK)
+
+	zipWriter := zip.NewWriter(w)
+	defer zipWriter.Close()
+
+	lf, err := os.Open(s.mainLogFilePath)
+	if err != nil {
+		log.Errorf("error opening bisonw log file: %v", err)
+		return
+	}
+	defer lf.Close()
+
+	iow, err := zipWriter.Create("bwlog.txt") // only 1 file in zip header
+	if err != nil {
+		log.Errorf("error creating an io.Writer: %v", err)
+		return
+	}
+
+	if _, err := io.Copy(iow, lf); err != nil {
+		log.Errorf("error copying bisonw log to zip writer: %v", err)
+		return
+	}
+}
+
 func (s *WebServer) redeemGameCode(w http.ResponseWriter, r *http.Request) {
 	var form struct {
 		Code  dex.Bytes        `json:"code"`

client/webserver/locales/en-us.go

@@ -679,4 +679,5 @@ var EnUS = map[string]*intl.Translation{
 	"Wallet Balances":             {T: "Wallet Balances"},
 	"Placements":                  {T: "Placements"},
 	"delete_bot":                  {T: "Delete Bot"},
+	"export_logs":                 {T: "Export Logs"},
 }

client/webserver/site/src/css/icons.scss

@@ -155,6 +155,12 @@
   display: inline-block;
 }
 
+.ico-wide-headed-down-arrow::before {
+  content: "\e919";
+  display: inline-block;
+  transform: rotate(270deg);
+}
+
 .ico-arrowup::before {
   content: "\e90c";
   display: inline-block;

client/webserver/site/src/html/settings.tmpl

@@ -76,6 +76,9 @@
         <p class="grey">[[[seed_implore_msg]]]</p>
         <button id="exportSeed" class="fs15">[[[View Application Seed]]]</button>
       </div>
+      <div id="exportLogs" class="py-3 mb-3 border-bottom pointer hoverbg">
+        <span class="ico-wide-headed-down-arrow"></span> [[[export_logs]]]
+      </div>
       <div id="gameCodeLink" class="py-3 mb-3 border-bottom pointer hoverbg">
         <span class="ico-ticket"></span> [[[Redeem game code]]]
       </div>

client/webserver/site/src/js/settings.ts

@@ -161,6 +161,8 @@ export default class SettingsPage extends BasePage {
     })
     forms.bind(page.exportSeedAuth, page.exportSeedSubmit, () => this.submitExportSeedReq())
 
+    Doc.bind(page.exportLogs, 'click', () => this.exportLogs())
+
     Doc.bind(page.gameCodeLink, 'click', () => this.showForm(page.gameCodeForm))
     Doc.bind(page.gameCodeSubmit, 'click', () => this.submitGameCode())
 
@@ -461,6 +463,16 @@ export default class SettingsPage extends BasePage {
     Doc.show(form)
   }
 
+  async exportLogs () {
+    console.log('exportLogs->')
+
+    const url = new URL(window.location.href)
+    url.pathname = '/api/exportapplog'
+    window.open(url.toString())
+
+    console.log('exportLogs<-')
+  }
+
   async submitGameCode () {
     const page = this.page
     Doc.hide(page.gameCodeErr)

client/webserver/webserver.go

@@ -238,8 +238,9 @@ type Config struct {
 	// should be used by default since site files from older distributions may
 	// be present on the disk. When NoEmbed is true, this also implies reloading
 	// and execution of html templates on each request.
-	NoEmbed  bool
-	HttpProf bool
+	NoEmbed         bool
+	HttpProf        bool
+	MainLogFilePath string
 }
 
 type valStamp struct {
@@ -270,7 +271,8 @@ type WebServer struct {
 	bondBufMtx sync.Mutex
 	bondBuf    map[uint32]valStamp
 
-	useDEXBranding bool
+	useDEXBranding  bool
+	mainLogFilePath string
 }
 
 // New is the constructor for a new WebServer. CustomSiteDir in the Config can
@@ -392,6 +394,7 @@ func New(cfg *Config) (*WebServer, error) {
 		cachedPasswords: make(map[string]*cachedPassword),
 		bondBuf:         map[uint32]valStamp{},
 		useDEXBranding:  useDEXBranding,
+		mainLogFilePath: cfg.MainLogFilePath,
 	}
 	s.lang.Store(lang)
 
@@ -556,6 +559,7 @@ func New(cfg *Config) (*WebServer, error) {
 			apiAuth.Post("/txhistory", s.apiTxHistory)
 			apiAuth.Post("/takeaction", s.apiTakeAction)
 			apiAuth.Post("/redeemgamecode", s.redeemGameCode)
+			apiAuth.Get("/exportapplog", s.apiExportAppLogs)
 
 			apiAuth.Post("/stakestatus", s.apiStakeStatus)
 			apiAuth.Post("/setvsp", s.apiSetVSP)