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handlers.go
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handlers.go
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package main
import (
"html/template"
"net/http"
"strconv"
"strings"
"time"
// "github.com/gin-contrib/static"
"github.com/gin-contrib/multitemplate"
"github.com/gin-gonic/gin"
)
func serve(host, port string) {
gin.SetMode(gin.ReleaseMode)
router := gin.Default()
router.HTMLRender = loadTemplates("index.tmpl")
// router.Use(static.Serve("/static/", static.LocalFile("./static", true)))
router.GET("/", func(c *gin.Context) {
c.Redirect(302, "/"+randomAlliterateCombo())
})
router.GET("/:page", func(c *gin.Context) {
page := c.Param("page")
c.Redirect(302, "/"+page+"/edit")
})
router.GET("/:page/*command", handlePageRequest)
router.POST("/update", handlePageUpdate)
router.POST("/prime", handlePrime)
router.POST("/lock", handleLock)
router.POST("/encrypt", handleEncrypt)
router.DELETE("/oldlist", handleClearOldListItems)
router.DELETE("/listitem", deleteListItem)
router.Run(host + ":" + port)
}
func loadTemplates(list ...string) multitemplate.Render {
r := multitemplate.New()
for _, x := range list {
templateString, err := Asset("templates/" + x)
if err != nil {
panic(err)
}
tmplMessage, err := template.New(x).Parse(string(templateString))
if err != nil {
panic(err)
}
r.Add(x, tmplMessage)
}
return r
}
func handlePageRequest(c *gin.Context) {
page := c.Param("page")
command := c.Param("command")
if len(command) < 2 {
command = "/ "
}
// Serve static content from memory
if page == "static" {
filename := page + command
data, err := Asset(filename)
if err != nil {
c.String(http.StatusInternalServerError, "Could not find data")
}
c.Data(http.StatusOK, contentType(filename), data)
return
}
version := c.DefaultQuery("version", "ajksldfjl")
p := Open(page)
// Disallow anything but viewing locked/encrypted pages
if (p.IsEncrypted || p.IsLocked) &&
(command[0:2] != "/v" && command[0:2] != "/r") {
c.Redirect(302, "/"+page+"/view")
return
}
// Destroy page if it is opened and primed
if p.IsPrimedForSelfDestruct && !p.IsLocked && !p.IsEncrypted {
p.Update("*This page has self-destructed. You can not return to it.*\n\n" + p.Text.GetCurrent())
p.Erase()
}
if command == "/erase" {
if !p.IsLocked && !p.IsEncrypted {
p.Erase()
c.Redirect(302, "/"+page+"/edit")
} else {
c.Redirect(302, "/"+page+"/view")
}
return
}
rawText := p.Text.GetCurrent()
rawHTML := p.RenderedPage
// Check to see if an old version is requested
versionInt, versionErr := strconv.Atoi(version)
if versionErr == nil && versionInt > 0 {
versionText, err := p.Text.GetPreviousByTimestamp(int64(versionInt))
if err == nil {
rawText = versionText
rawHTML = GithubMarkdownToHTML(rawText)
}
}
// Get history
var versionsInt64 []int64
var versionsChangeSums []int
var versionsText []string
if command[0:2] == "/h" {
versionsInt64, versionsChangeSums = p.Text.GetMajorSnapshotsAndChangeSums(60) // get snapshots 60 seconds apart
versionsText = make([]string, len(versionsInt64))
for i, v := range versionsInt64 {
versionsText[i] = time.Unix(v/1000000000, 0).Format("Mon Jan 2 15:04:05 MST 2006")
}
versionsText = reverseSliceString(versionsText)
versionsInt64 = reverseSliceInt64(versionsInt64)
versionsChangeSums = reverseSliceInt(versionsChangeSums)
}
if command[0:2] == "/r" {
c.Writer.Header().Set("Content-Type", contentType(p.Name))
c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
c.Writer.Header().Set("Access-Control-Max-Age", "86400")
c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, X-Max")
c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
c.Data(200, contentType(p.Name), []byte(rawText))
return
}
log.Debug(command)
log.Debug("%v", command[0:2] != "/e" &&
command[0:2] != "/v" &&
command[0:2] != "/l" &&
command[0:2] != "/h")
var FileNames, FileLastEdited []string
var FileSizes, FileNumChanges []int
if page == "ls" {
command = "/view"
FileNames, FileSizes, FileNumChanges, FileLastEdited = DirectoryList()
}
c.HTML(http.StatusOK, "index.tmpl", gin.H{
"EditPage": command[0:2] == "/e", // /edit
"ViewPage": command[0:2] == "/v", // /view
"ListPage": command[0:2] == "/l", // /list
"HistoryPage": command[0:2] == "/h", // /history
"DontKnowPage": command[0:2] != "/e" &&
command[0:2] != "/v" &&
command[0:2] != "/l" &&
command[0:2] != "/h",
"DirectoryPage": page == "ls",
"FileNames": FileNames,
"FileSizes": FileSizes,
"FileNumChanges": FileNumChanges,
"FileLastEdited": FileLastEdited,
"Page": page,
"RenderedPage": template.HTML([]byte(rawHTML)),
"RawPage": rawText,
"Versions": versionsInt64,
"VersionsText": versionsText,
"VersionsChangeSums": versionsChangeSums,
"IsLocked": p.IsLocked,
"IsEncrypted": p.IsEncrypted,
"ListItems": renderList(rawText),
"Route": "/" + page + command,
"HasDotInName": strings.Contains(page, "."),
})
}
func handlePageUpdate(c *gin.Context) {
type QueryJSON struct {
Page string `json:"page"`
NewText string `json:"new_text"`
}
var json QueryJSON
if c.BindJSON(&json) != nil {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Wrong JSON"})
return
}
if len(json.NewText) > 100000 {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Too much"})
return
}
log.Trace("Update: %v", json)
p := Open(json.Page)
var message string
if p.IsLocked {
message = "Locked"
} else if p.IsEncrypted {
message = "Encrypted"
} else {
p.Update(json.NewText)
p.Save()
message = "Saved"
}
c.JSON(http.StatusOK, gin.H{"success": true, "message": message})
}
func handlePrime(c *gin.Context) {
type QueryJSON struct {
Page string `json:"page"`
}
var json QueryJSON
if c.BindJSON(&json) != nil {
c.String(http.StatusBadRequest, "Problem binding keys")
return
}
log.Trace("Update: %v", json)
p := Open(json.Page)
if p.IsLocked {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Locked"})
return
} else if p.IsEncrypted {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Encrypted"})
return
}
p.IsPrimedForSelfDestruct = true
p.Save()
c.JSON(http.StatusOK, gin.H{"success": true, "message": "Primed"})
}
func handleLock(c *gin.Context) {
type QueryJSON struct {
Page string `json:"page"`
Passphrase string `json:"passphrase"`
}
var json QueryJSON
if c.BindJSON(&json) != nil {
c.String(http.StatusBadRequest, "Problem binding keys")
return
}
p := Open(json.Page)
if p.IsEncrypted {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Encrypted"})
return
}
var message string
if p.IsLocked {
err2 := CheckPasswordHash(json.Passphrase, p.PassphraseToUnlock)
if err2 != nil {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Can't unlock"})
return
}
p.IsLocked = false
message = "Unlocked"
} else {
p.IsLocked = true
p.PassphraseToUnlock = HashPassword(json.Passphrase)
message = "Locked"
}
p.Save()
c.JSON(http.StatusOK, gin.H{"success": true, "message": message})
}
func handleEncrypt(c *gin.Context) {
type QueryJSON struct {
Page string `json:"page"`
Passphrase string `json:"passphrase"`
}
var json QueryJSON
if c.BindJSON(&json) != nil {
c.String(http.StatusBadRequest, "Problem binding keys")
return
}
p := Open(json.Page)
if p.IsLocked {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Locked"})
return
}
q := Open(json.Page)
var message string
if p.IsEncrypted {
decrypted, err2 := DecryptString(p.Text.GetCurrent(), json.Passphrase)
if err2 != nil {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Wrong password"})
return
}
q.Erase()
q = Open(json.Page)
q.Update(decrypted)
q.IsEncrypted = false
q.IsLocked = p.IsLocked
q.IsPrimedForSelfDestruct = p.IsPrimedForSelfDestruct
message = "Decrypted"
} else {
currentText := p.Text.GetCurrent()
encrypted, _ := EncryptString(currentText, json.Passphrase)
q.Erase()
q = Open(json.Page)
q.Update(encrypted)
q.IsEncrypted = true
q.IsLocked = p.IsLocked
q.IsPrimedForSelfDestruct = p.IsPrimedForSelfDestruct
message = "Encrypted"
}
q.Save()
c.JSON(http.StatusOK, gin.H{"success": true, "message": message})
}
func deleteListItem(c *gin.Context) {
lineNum, err := strconv.Atoi(c.DefaultQuery("lineNum", "None"))
page := c.Query("page") // shortcut for c.Request.URL.Query().Get("lastname")
if err == nil {
p := Open(page)
_, listItems := reorderList(p.Text.GetCurrent())
newText := p.Text.GetCurrent()
for i, lineString := range listItems {
// fmt.Println(i, lineString, lineNum)
if i+1 == lineNum {
// fmt.Println("MATCHED")
if strings.Contains(lineString, "~~") == false {
// fmt.Println(p.Text, "("+lineString[2:]+"\n"+")", "~~"+lineString[2:]+"~~"+"\n")
newText = strings.Replace(newText+"\n", lineString[2:]+"\n", "~~"+strings.TrimSpace(lineString[2:])+"~~"+"\n", 1)
} else {
newText = strings.Replace(newText+"\n", lineString[2:]+"\n", lineString[4:len(lineString)-2]+"\n", 1)
}
p.Update(newText)
break
}
}
c.JSON(200, gin.H{
"success": true,
"message": "Done.",
})
} else {
c.JSON(200, gin.H{
"success": false,
"message": err.Error(),
})
}
}
func handleClearOldListItems(c *gin.Context) {
type QueryJSON struct {
Page string `json:"page"`
}
var json QueryJSON
if c.BindJSON(&json) != nil {
c.String(http.StatusBadRequest, "Problem binding keys")
return
}
p := Open(json.Page)
if p.IsEncrypted {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Encrypted"})
return
}
if p.IsLocked {
c.JSON(http.StatusOK, gin.H{"success": false, "message": "Locked"})
return
}
lines := strings.Split(p.Text.GetCurrent(), "\n")
newLines := make([]string, len(lines))
newLinesI := 0
for _, line := range lines {
if strings.Count(line, "~~") != 2 {
newLines[newLinesI] = line
newLinesI++
}
}
p.Update(strings.Join(newLines[0:newLinesI], "\n"))
p.Save()
c.JSON(http.StatusOK, gin.H{"success": true, "message": "Cleared"})
}