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package handlers
import (
"bytes"
"database/sql"
"html/template"
"io"
"log"
"mime/multipart"
"net/http"
"os"
"strconv"
"time"
"paterissa.net/mblog/internal/models"
)
type blogContext struct {
err *log.Logger
db *sql.DB
Post models.Post
Rows []models.Post
Name string
IsAuth bool
PagePopulated bool
Offset int
}
func (ctx *blogContext) viewPost(w http.ResponseWriter, r *http.Request) {
ctx.Rows = []models.Post{}
postId := r.URL.Query().Get("id")
stmt, err := ctx.db.Prepare("SELECT p.id, u.name, p.time, p.brief, p.content FROM posts p INNER JOIN logins u ON p.user_id = u.id WHERE p.id = $1;")
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not prepare statement for DB: %v\n", err)
return
}
defer stmt.Close()
row := stmt.QueryRow(postId)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not load post from DB: %v\n", err)
return
}
var p models.Post
err = row.Scan(&p.Id, &p.Name, &p.Time, &p.Brief, &p.Content)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not load post from DB: %v\n", err)
return
}
p.FormattedTime = p.Time.Format(time.ANSIC)
ctx.Post = p
files := []string{
"ui/html/base.tmpl.html",
"ui/html/music_player.tmpl.html",
"ui/html/pages/post.tmpl.html",
}
compiled, err := template.ParseFiles(files...)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not parse template: %v\n", err)
return
}
err = compiled.ExecuteTemplate(w, "base", ctx)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not execute template: %v\n", err)
return
}
}
func (ctx *blogContext) post(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
w.WriteHeader(http.StatusMethodNotAllowed)
w.Write([]byte("Method Not Allowed"))
return
}
cookie, err := r.Cookie("paterissa_session_token")
if err != nil {
w.WriteHeader(http.StatusUnauthorized)
w.Write([]byte("Unauthorized"))
return
}
stmt, err := ctx.db.Prepare("SELECT * FROM cookies WHERE content = $1;")
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not load cookies from DB: %v\n", err)
return
}
var id uint64
var content string
var userId uint64
var expiration time.Time
row := stmt.QueryRow(cookie.Value)
err = row.Scan(&id, &content, &userId, &expiration)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
return
}
err = r.ParseMultipartForm(4 << 20)
if err != nil {
w.WriteHeader(http.StatusUnprocessableEntity)
w.Write([]byte("Failed to retrieve form data"))
ctx.err.Printf("Could not parse request form: %v\n", err)
return
}
var buffer bytes.Buffer
boundary := "----internal-parser-req"
writer := multipart.NewWriter(&buffer)
writer.SetBoundary(boundary)
writer.WriteField("user_id", strconv.Itoa(int(userId)))
part, err := writer.CreateFormField("raw")
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not create form field: %v\n", err)
return
}
_, err = part.Write([]byte(r.Form.Get("raw")))
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not create form field: %v\n", err)
return
}
writer.Close()
proxyReq, err := http.NewRequest(r.Method, "http://127.0.0.1:"+os.Getenv("parser_port"), bytes.NewReader(buffer.Bytes()))
proxyReq.Header = make(http.Header)
for key, val := range r.Header {
if key != "Content-Length" {
proxyReq.Header[key] = val
}
}
proxyReq.Header.Set("Content-Type", writer.FormDataContentType())
resp, err := http.DefaultClient.Do(proxyReq)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Fail response from parser: %v\n", err)
return
}
if resp.StatusCode != http.StatusOK {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
body, err := io.ReadAll(resp.Body)
if err == nil {
ctx.err.Printf("Fail response from parser: %s\n", body)
}
return
}
defer resp.Body.Close()
return
}
func (ctx *blogContext) index(w http.ResponseWriter, r *http.Request) {
ctx.Rows = []models.Post{}
ctx.IsAuth = false
ctx.PagePopulated = false
if r.URL.Path != "/" {
http.NotFound(w, r)
return
}
_, err := r.Cookie("paterissa_session_token")
if err == nil {
ctx.IsAuth = true
}
ctx.Offset, _ = strconv.Atoi(r.URL.Query().Get("offset"))
rows, err := ctx.db.Query("SELECT p.id, u.name, p.time, p.brief FROM posts p INNER JOIN logins u ON p.user_id = u.id WHERE p.id > " + strconv.Itoa(ctx.Offset) + " ORDER BY p.id DESC LIMIT 20;")
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not load posts from DB: %v\n", err)
return
}
defer rows.Close()
for rows.Next() {
var p models.Post
if err = rows.Scan(&p.Id, &p.Name, &p.Time, &p.Brief); err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not load row: %v\n", err)
return
}
p.FormattedTime = p.Time.Format(time.ANSIC)
ctx.Rows = append(ctx.Rows, p)
ctx.PagePopulated = true
}
files := []string{
"ui/html/base.tmpl.html",
"ui/html/music_player.tmpl.html",
"ui/html/pages/index.tmpl.html",
}
funcMap := template.FuncMap{
"add": func(a int, b int) int {
return a + b
},
"sub": func(a int, b int) int {
return a - b
},
}
compiled, err := template.New("blog").Funcs(funcMap).ParseFiles(files...)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not parse template: %v\n", err)
return
}
err = compiled.ExecuteTemplate(w, "base", ctx)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Internal Error"))
ctx.err.Printf("Could not execute template: %v\n", err)
return
}
}
|
