1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
package main
import (
"bytes"
"context"
"database/sql"
"fmt"
"log"
"net/http"
"os"
"strconv"
"time"
"github.com/joho/godotenv"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/parser"
"github.com/yuin/goldmark/renderer/html"
"golang.org/x/crypto/bcrypt"
_ "github.com/jackc/pgx/v5/stdlib"
)
var db *sql.DB
var mdParser goldmark.Markdown
func writeErr(w http.ResponseWriter, errcode int, msg string) {
w.WriteHeader(errcode)
w.Write([]byte(msg))
return
}
func mdServe(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
writeErr(w, 405, "Method Not Allowed")
return
}
err := r.ParseMultipartForm(4 << 20)
if err != nil {
writeErr(w, 500, "Failed to retrieve form data")
return
}
var buf bytes.Buffer
md := r.PostForm.Get("raw")
err = mdParser.Convert([]byte(md), &buf)
if err != nil {
writeErr(w, 500, fmt.Sprintf("Failed to compile markdown into html: %v", err))
return
}
ctx, cancel := context.WithTimeout(r.Context(), 5 * time.Second)
defer cancel()
tx, err := db.BeginTx(ctx, nil)
if err != nil {
writeErr(w, 500, fmt.Sprintf("Failed to initialize transaction: %v", err))
return
}
defer tx.Rollback()
stmt, err := tx.PrepareContext(ctx, "INSERT INTO posts (name, content) VALUES ($1, $2);")
if err != nil {
writeErr(w, 500, fmt.Sprintf("Failed to prepare DB statement: %v", err))
return
}
defer stmt.Close()
_, err = stmt.ExecContext(ctx, os.Getenv("webmaster"), buf.Bytes())
if err != nil {
writeErr(w, 500, fmt.Sprintf("Failed to execute statement: %v", err))
return
}
err = tx.Commit()
if err != nil {
writeErr(w, 500, fmt.Sprintf("Failed to commit DB transaction: %v", err))
}
w.WriteHeader(200)
w.Write([]byte("Successfully parsed and stored markdown"))
}
func main() {
err := godotenv.Load()
if err != nil {
log.Fatal("Failed to load env")
}
mdParser = goldmark.New(
goldmark.WithExtensions(
extension.GFM,
extension.Footnote,
extension.Typographer,
),
goldmark.WithParserOptions(
parser.WithAutoHeadingID(),
),
goldmark.WithRendererOptions(
html.WithHardWraps(),
),
)
host := os.Getenv("db_host")
port, err := strconv.ParseUint(os.Getenv("db_port"), 10, 64)
if err != nil {
port = 5432
}
dbName := os.Getenv("db_name")
user := os.Getenv("db_user")
pass := os.Getenv("db_pass")
connStr := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=disable", host, port, user, pass, dbName)
db, err = sql.Open("pgx", connStr)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to connect to DB: %v\n", err)
os.Exit(1)
}
defer db.Close()
_, table_check := db.Query("SELECT * FROM posts;")
if table_check != nil {
_, err = db.Exec("CREATE TABLE posts (id SERIAL PRIMARY KEY, name VARCHAR(50) NOT NULL, time TIMESTAMP DEFAULT CURRENT_TIMESTAMP, content TEXT NOT NULL);")
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to create posts table: %v\n", err)
os.Exit(1)
}
}
webmaster := os.Getenv("webmaster")
passOne := os.Getenv("blog_pass1")
passTwo := os.Getenv("blog_pass2")
_, table_check = db.Query("SELECT * FROM logins;")
if table_check != nil {
_, err = db.Exec("CREATE TABLE logins (id SERIAL PRIMARY KEY, name VARCHAR(50) NOT NULL, time DATE DEFAULT CURRENT_DATE, pass_one TEXT NOT NULL, pass_two TEXT NOT NULL);")
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to create logins table: %v\n", err)
os.Exit(1)
}
hashOne, errHashOne := bcrypt.GenerateFromPassword([]byte(passOne), 12)
hashTwo, errHashTwo := bcrypt.GenerateFromPassword([]byte(passTwo), 12)
if errHashOne != nil || errHashTwo != nil {
fmt.Fprintf(os.Stderr, "Failed to hash password")
os.Exit(1)
}
_, err = db.Exec(fmt.Sprintf("INSERT INTO logins (name, pass_one, pass_two) VALUES ('%s', '%s', '%s');", webmaster, hashOne, hashTwo))
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to add webmaster to logins table: %v\n", err)
os.Exit(1)
}
}
router := http.NewServeMux()
router.HandleFunc("/", mdServe)
appPort, err := strconv.ParseUint(os.Getenv("parser_port"), 10, 64)
if err != nil {
appPort = 5006
}
srv := &http.Server{
Addr: fmt.Sprintf(":%d", appPort),
Handler: router,
}
err = srv.ListenAndServe()
log.Fatal(err)
}
|
