/*
根据标签检索博客
*/
func (this *Model) QueryByTag(tagId int) (blogs []Blog, err error) {
//TODO
db, err := sql.Open("mysql", "root:dumx@tcp(localhost:3306)/myblog?charset=utf8")
if nil != err {
logger.Errorln(err)
return
}
defer db.Close()
querySql := "select * from myblog.blogs WHERE tag_id="
tmp := strconv.FormatInt(int64(tagId), 10)
querySql += tmp
rows, err := db.Query(querySql)
if nil != err {
logger.Errorln(err)
}
for rows.Next() {
var id, tagId int
var content, title, createDate string
rows.Scan(&id, &content, &title, &createDate, &tagId)
blogs = append(blogs, Blog{Id: id, Content: content, Title: title, CreateDate: createDate, TagId: tagId})
}
logger.Debugln("Blogs table :", blogs)
if 0 == len(blogs) {
err = errors.New("not found")
}
return
}
/*
添加管理员
*/
func (this *Model) AddUser(name, psw string) error {
username := html.EscapeString(name)
password := html.EscapeString(psw)
db, err := sql.Open("mysql", "root:dumx@tcp(localhost:3306)/myblog?charset=utf8")
if nil != err {
logger.Errorln(err)
return err
}
defer db.Close()
querySql := "select 1 from myblog.users WHERE name = ' " + username + "'"
rows, err := db.Query(querySql)
if nil != err {
logger.Errorln(err)
return err
}
if rows.Next() {
return errors.New("user " + username + "exsited")
}
insertSql := "INSERT myblog.users SET name=?, password=?"
stmt, err := db.Prepare(insertSql)
if nil != err {
logger.Errorln(err)
return err
}
defer stmt.Close()
_, err = stmt.Exec(username, password)
if nil != err {
logger.Errorln(err)
return err
}
return nil
}
/*
添加博客
*/
func (this *Model) AddBlog(title, content string, tagId int) error {
//防止SQL注入
title = html.EscapeString(title)
content = html.EscapeString(content)
//连接MYSQL数据库
db, err := sql.Open("mysql", "root:dumx@tcp(localhost:3306)/myblog?charset=utf8")
if nil != err {
logger.Errorln(err)
return err
}
defer db.Close()
//构建Sql语句
insertSql := "INSERT myblog.blogs SET content=?, title=?, create_date=?, tag_id=?"
stmt, err := db.Prepare(insertSql)
if nil != err {
logger.Errorln(err)
return err
}
defer stmt.Close()
//replacer := strings.NewReplacer(" ", " ", "\r", "<br/>")
//content = replacer.Replace(content)
//获取插入时间
now := strings.Split(time.Now().String(), " ")[0]
//执行SQL语句
_, err = stmt.Exec(content, title, now, tagId)
if nil != err {
logger.Errorln(err)
return err
}
return nil
}
/*
query all tags
*/
func (this *Model) QueryTags() (tags []Tag, err error) {
db, err := sql.Open("mysql", "root:dumx@tcp(localhost:3306)/myblog?charset=utf8")
if nil != err {
logger.Errorln(err)
return
}
defer db.Close()
querySql := "select * from myblog.tags"
rows, err := db.Query(querySql)
if nil != err {
logger.Errorln(err)
}
for rows.Next() {
var id int
var tag string
rows.Scan(&id, &tag)
tags = append(tags, Tag{id, tag})
}
logger.Debugln("Tags table :", tags)
if 0 == len(tags) {
err = errors.New("not found")
}
return
}
/*
管理员注册
*/
func (this *Admin) RegisterHandler(rw http.ResponseWriter, req *http.Request) {
logger.Infoln("entered Register()")
switch req.Method {
case "GET":
t, err := template.ParseFiles("views/admin/register.html")
if nil != err {
logger.Errorln(err)
return
}
if err = t.Execute(rw, nil); nil != err {
logger.Errorln(err)
return
}
case "POST":
req.ParseForm()
name := req.FormValue("username")
psw := req.FormValue("password")
confirmPsw := req.FormValue("confirm_password")
if psw != confirmPsw {
//TBD
}
model := models.Model{}
model.AddUser(name, psw)
http.Redirect(rw, req, "/", http.StatusFound)
}
}
/*
管理员登录
*/
func (this *Admin) LoginHandler(rw http.ResponseWriter, req *http.Request) {
logger.Infoln("entered Login()")
switch req.Method {
case "GET":
t, err := template.ParseFiles("views/admin/login.html")
if nil != err {
logger.Errorln(err)
return
}
if err = t.Execute(rw, nil); nil != err {
logger.Errorln(err)
return
}
case "POST":
req.ParseForm()
name := req.FormValue("username")
psw := req.FormValue("password")
if err := CheckNamePsw(name, psw); nil != err {
logger.Errorln(err)
http.Redirect(rw, req, "/login", http.StatusFound)
return
}
SetCookie(rw, CreateSessionID(name))
http.Redirect(rw, req, "/add", http.StatusFound)
}
}
func NotFoundHandler(rw http.ResponseWriter, req *http.Request) {
t, err := template.ParseFiles(utils.BaseHtmlTplFile, utils.Error404HtmlTplFile)
if nil != err {
logger.Errorln(err)
return
}
err = t.Execute(rw, nil)
if nil != err {
logger.Errorln(err)
return
}
}
/*
联系界面
*/
func (this *Contact) ContactHandler(rw http.ResponseWriter, req *http.Request) {
switch req.Method {
case "GET":
t, err := template.ParseFiles("views/contact/contact.html")
if nil != err {
logger.Errorln(err)
return
}
if err = t.Execute(rw, nil); nil != err {
logger.Errorln(err)
return
}
case "POST":
}
}
/*
根据用户选择的标题，获取具体博客
*/
func (this *Articles) ArticleByTitle(blogId int) (blog []models.Blog, err error) {
//按照标题查找博客
blog, err = new(models.Model).QueryByTitle(blogId)
if nil != err {
logger.Errorln(err)
}
return
}
func (this *Admin) AddBlogHandler(rw http.ResponseWriter, req *http.Request) {
logger.Infoln("entered AddBlogHandler()")
req.ParseForm()
//name,err :=CheckCookie(r)
//if err != nil{
// log.Println(err)
// http.Redirect(w,r,"/", http.StatusFound)
// return
// }
switch req.Method {
case "GET":
t, err := template.ParseFiles("views/admin/add_blog.html")
if nil != err {
logger.Errorln(err)
return
}
//查询博客标签
m := models.Model{}
tags, err := m.QueryTags()
if nil != err {
logger.Errorln(err)
}
//为了使用查询出来的博客标签，格式化查询结果
type tmp struct {
Tags []models.Tag
}
tmp2 := tmp{tags}
if err = t.Execute(rw, tmp2); nil != err {
logger.Errorln(err)
return
}
case "POST":
title := req.FormValue("title")
content := req.FormValue("content")
tag := req.FormValue("tag")
tagId, _ := strconv.Atoi(tag) //从前端返回的是tag的ID
logger.Debugln("title: ", title)
logger.Debugln("content: ", content)
logger.Debugln("arcticleTag: ", tag)
model := models.Model{}
model.AddBlog(title, content, tagId)
http.Redirect(rw, req, "/", http.StatusFound)
}
}
/*
根据用户选择的tag，来显示具体哪些文章
*/
func (this *Articles) ArticlesByTag(tagId int) (blogs []models.Blog, err error) {
//按照标签查找博客
blogs, err = new(models.Model).QueryByTag(tagId)
if nil != err {
logger.Errorln(err)
blogs = append(blogs, models.Blog{Title: "no article"})
}
return
}
/*
获取所有博客内容存储在@AllBlogs
*/
func (this *Articles) QueryAllBlogs() (err error) {
if 0 < len(AllBlogs) {
return //已经查询过，AllBlogs已经有数据
}
//提取所有博客
AllBlogs, err = new(models.Model).QueryBlogs()
if nil != err {
logger.Errorln(err)
}
return
}
/*
检查用户名和密码
Return Value：nil：success
*/
func (this *Model) CheckNamePsw(name, psw string) error {
username := html.EscapeString(name)
password := html.EscapeString(psw)
db, err := sql.Open("mysql", "root:dumx@tcp(localhost:3306)/myblog?charset=utf8")
if nil != err {
logger.Errorln(err)
return err
}
defer db.Close()
querySql := "select 1 from myblog.users WHERE name = '" + username + "' AND password = '******'"
rows, err := db.Query(querySql)
if nil != err {
logger.Errorln(err)
return err
}
if rows.Next() {
return nil
}
return errors.New("Unkown error")
}
func GetId(title, blogType, username string) (titleId, typeId, userId int64) {
title = html.EscapeString(title)
blogType = html.EscapeString(blogType)
username = html.EscapeString(username)
db, err := sql.Open("mysql", "root:dumx@tcp(localhost:3306)/myblog?charset=utf8")
if nil != err {
logger.Errorln(err)
}
defer db.Close()
sql := `SELECT id FROM myblog.title WHERE title = '` + title + `'`
rows, err := db.Query(sql)
if nil != err {
logger.Errorln(err)
}
for rows.Next() {
rows.Scan(&titleId)
}
sql = `SELECT id FROM myblog.blog_type WHERE blog_type = '` + blogType + `'`
rows, err = db.Query(sql)
if nil != err {
logger.Errorln(err)
}
for rows.Next() {
rows.Scan(&typeId)
}
sql = `SELECT userid FROM myblog.users WHERE name = '` + username + `'`
rows, err = db.Query(sql)
if nil != err {
logger.Errorln(err)
}
for rows.Next() {
rows.Scan(&userId)
}
return
}
/*
query all blogs
*/
func (this *Model) QueryBlogs() (blogs []Blog, err error) {
//连接数据库
db, err := sql.Open(config.Config["driver_name"], config.Config["dsn"])
if nil != err {
logger.Errorln(err)
return
}
defer db.Close()
//sql := `SELECT * FROM myblog.blogs LIMIT `
//因为博客文章不多，所以一次性的把所有博客都读取到内存中。
//数据库更新频率很低，所以也没有内存和数据之间的同步
sql := `SELECT * FROM myblog.blogs`
//执行SQL语句
rows, err := db.Query(sql)
if nil != err {
logger.Errorln(err)
return
}
//把查询到的数据格式化
for rows.Next() {
var id, tagId int
var content, title, createDate string
rows.Scan(&id, &content, &title, &createDate, &tagId)
blogs = append(blogs, Blog{Id: id, Content: content, Title: title, CreateDate: createDate, TagId: tagId})
}
logger.Debugln("Blogs table :", blogs)
//没有查询到博客，设置err值
if 0 == len(blogs) {
err = errors.New("not found")
}
return
}
/*
根据用户选择的page，来显示具体哪些文章
*/
func (this *Articles) ArticleByPage(pageId int) (blogs []models.Blog, err error) {
err = this.QueryAllBlogs()
if nil != err {
logger.Errorln(err)
return
}
println(pageId)
//访问的page没有超出
if pageId <= 0 || len(AllBlogs) < pageId*MaxPageNum+MaxPageNum {
blogs = AllBlogs[0:MaxPageNum : MaxPageNum+1]
} else {
println(pageId * MaxPageNum)
println(pageId*MaxPageNum + MaxPageNum)
logger.Debugln(len(AllBlogs))
blogs = AllBlogs[pageId*MaxPageNum : pageId*MaxPageNum+MaxPageNum]
}
return
}
/*
显示所有文章
*/
func (this *Articles) ArticlesHandler(rw http.ResponseWriter, req *http.Request) {
logger.Infoln("entered ArticlesHandler()")
//username,err := CheckCookie(r)
//if err != nil{
// log.Println(err)
//http.Redirect(w,r,"/", http.StatusFound)
// }
var blogs []models.Blog
var err error
var pageId int = 0
switch req.Method {
case "GET":
switch {
case "" != req.FormValue("title"):
strTitle := req.FormValue("title")
logger.Debugln(strTitle)
titleId, _ := strconv.Atoi(strTitle)
blogs, err = this.ArticleByTitle(titleId)
case "" != req.FormValue("tag"):
strTag := req.FormValue("tag")
logger.Debugln(strTag)
tagId, _ := strconv.Atoi(strTag)
blogs, err = this.ArticleByTitle(tagId)
case "" != req.FormValue("page"):
strPage := req.FormValue("page")
logger.Debugln(strPage)
pageId, _ = strconv.Atoi(strPage)
blogs, err = this.ArticleByPage(pageId)
default:
err = this.QueryAllBlogs()
if nil != err {
logger.Errorln(err)
return
}
blogs = AllBlogs
}
//获取所有标签
var tags []models.Tag
tags, err = new(models.Model).QueryTags()
if nil != err {
logger.Errorln(err)
return
}
//格式化所有博客和标签，以便template包使用
type tmp struct {
Blgs []models.Blog
Tags []models.Tag
Page []int //多少页博客
CurPage int //现在显示哪一页
}
//为了在前端显示分页信息，make一个数组
pageNum := 0
if len(AllBlogs)%MaxPageNum == 0 {
pageNum = len(AllBlogs) / MaxPageNum
} else {
pageNum = len(AllBlogs)/MaxPageNum + 1
}
var pages = make([]int, pageNum, pageNum)
for i := 0; i < pageNum; i++ {
pages[i] = i + 1
}
if 0 == pageId {
pageId = pageId + 1
}
tmp2 := tmp{blogs, tags, pages, pageId}
t := template.New("")
t = t.Funcs(template.FuncMap{"plus": utils.Plus})
//ParseFiles uses the filename as the template name inside of the template object.
t, err = t.ParseFiles("views/articles/index.html")
if nil != err {
logger.Errorln(err)
log.Println(err)
return
}
//显示内容
//ParseFiles uses the filename as the template name inside of the template object.
//So, Have to use ExecuteTemplate() instead fo Execute(),
//and use index.html as the name of t
if err = t.ExecuteTemplate(rw, "index.html", tmp2); nil != err {
logger.Errorln(err)
log.Println(err)
return
}
case "POST":
//TODO
}
}
