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secure user input

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j.mei7
2022-04-03 17:42:22 +02:00
parent eddfa544a4
commit 12dd3f9e53
5 changed files with 144 additions and 40 deletions
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BIN
express_backend/database.db
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13
express_backend/securePostData.js Normal file
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@@ -0,0 +1,13 @@
function secure(text){
text = text.replace(/'/g, "\\u0027");
return text;
}
function decode(text){
text = text.replace(/\\u0027/g, "'");
return text;
}
module.exports = {
secure, decode
}

46
express_backend/server.js
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@@ -4,7 +4,7 @@ const app = express();
const sqlite3 = require('sqlite3');
const db = new sqlite3.Database("database.db")
const port = process.env.PORT || 5000;
const securePostData = require('./securePostData');
// body parser
const bodyParser = require('body-parser');
app.use(bodyParser.json());
@@ -29,6 +29,10 @@ app.get('/idea/:id', (req, res) => {
res.send({title: "Error", content: "Error fetching idea"});
}else{
if(rows.length > 0){
// De-Formatting
rows[0].title = securePostData.decode(rows[0].title);
rows[0].content = securePostData.decode(rows[0].content);
res.json(rows[0]);
}else{
res.send({title: "Error", content: "Idea not found"});
@@ -42,6 +46,11 @@ app.get('/ideas', (req, res) => {
if (err) {
res.send({title: "Error", content: "Error fetching ideas"});
}else{
for (let i = 0; i < rows.length; i++) {
// De-Formatting
rows[i].title = securePostData.decode(rows[i].title);
rows[i].content = securePostData.decode(rows[i].content);
}
res.json(rows);
}
});
@@ -49,11 +58,40 @@ app.get('/ideas', (req, res) => {
app.post('/idea/update/:id', (req, res) => {
db.run(`UPDATE ideas SET title = '${req.body.title}', content = '${req.body.content}' WHERE id = ${req.params.id}`, (err) => {
// Validate POST
if(!req.body.title || req.body.title.replace(/\s/g, '').length === 0){
res.send({title: "Error", type:"title", message: "Title is required"});
return;
}else if(!req.body.content || req.body.content.replace(/\s/g, '').length === 0){
res.send({title: "Error", type:"content", message: "Content is required"});
return;
}
let regexPattern = /^[a-zA-ZÀ-úÀ-ÿÀ-ÿÀ-ÖØ-öø-ÿ0-9ßäöüÄÖÜ!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?`´\s]*$/;
if(!regexPattern.test(req.body.title)){
res.send({title: "Error", type:"title", message: "Title contains invalid characters"});
return;
}else if(!regexPattern.test(req.body.content)){
res.send({title: "Error", type:"content", message: "Content contains invalid characters"});
return;
}
// replace ' with \u0027
let title = securePostData.secure(req.body.title);
let content = securePostData.secure(req.body.content);
db.run(`UPDATE ideas SET title = '${title}', content = '${content}' WHERE id = ${req.params.id}`, (err) => {
if (err) {
res.send({title: "Error", content: "Error updating idea"});
res.send({title: "Error", type:"saving", message: "Error updating idea"});
}else{
res.send({title: "Success", content: "Idea updated"});
res.send({title: "Success", type:"saving", message: "Idea updated"});
}
});
});

36
react_frontend/src/IdeaContent.js
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@@ -7,21 +7,24 @@ function IdeaContent(){
let [title, setTitle] = useState("");
let [content, setContent] = useState("")
let [saved , setSaved] = useState(false);
let [seconds, setSeconds] = useState(0);
let [intervalTime, setintervalTime] = useState(0);
let [contentError, setContentError] = useState("");
let [titleError, setTitleError] = useState("");
let secondsSaveInterval = 3;
//let secondsSaveInterval = 0;
// TIMER
useEffect(() => {
const interval = setInterval(() => {
setSeconds(seconds => seconds + 1);
setintervalTime(intervalTime => intervalTime + 1);
if(seconds > secondsSaveInterval){ // save every > secondsSaveInterval seconds
if(intervalTime > 0){
saveData();
setSeconds(0);
setintervalTime(0);
}
}, 1000);
}, 500);
return () => clearInterval(interval);
});
@@ -44,7 +47,18 @@ function IdeaContent(){
if(res.title === "Success"){
setSaved(true);
} else {
setContentError("");
setTitleError("");
} else if(res.title === "Error"){
if(res.type === "content"){
setContentError(res.message);
setTitleError("");
} else if(res.type === "title"){
setTitleError(res.message);
setContentError("");
}
setSaved(false);
}else{
setSaved(false);
}
}
@@ -69,14 +83,20 @@ function IdeaContent(){
return(
<div className="ideaContent">
<div className="head">
<label htmlFor="title">
<input type="text" name="title"
className={titleError ? "input-error" : ""}
value={title}
onChange={(e) => { setTitle(e.target.value); setSaved(false) }}
placeholder="Insert a title"/>
<small className="error-text">{titleError}</small>
</label>
<small>{saved ? "Saved!": "Saving..."}</small>
</div>
<div className="textAreaContainer">
<textarea value={content} onChange={(e) => { setContent(e.target.value); setSaved(false)}}></textarea>
<small className="error-text">{contentError}</small>
<textarea className={contentError ? "input-error" : ""} value={content} onChange={(e) => { setContent(e.target.value); setSaved(false)}}></textarea>
</div>
</div>
)

41
react_frontend/src/css/IdeaContent.scss
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@@ -6,12 +6,19 @@
.head{
padding-top: 20px;
padding-bottom: 20px;
padding-bottom: 50px;
margin-bottom: 20px;
border-bottom: 2px solid rgba(87, 87, 87, 0.3);
width: 100%;
display: block;
label{
margin-left: 50px;
margin-bottom: 20px;
width: 60%;
display: block;
float: left;
input{
background-color: transparent;
border: 0px;
@@ -19,9 +26,8 @@
font-size: 24pt;
color: white;
outline:none;
margin-left: 50px;
font-weight: bold;
width: 60%;
width: 100%;
transition: 100ms;
transition-timing-function: linear;
@@ -40,6 +46,8 @@
}
}
}
.textAreaContainer{
width: 100%;
height: 700px;
@@ -48,7 +56,7 @@
textarea{
outline: 0;
display: block;
width: calc(100% - 40px);
width: calc(100% - 43px);
height: 100%;
background-color: rgba(71, 71, 71, 0.171);
border: 0px solid transparent;
@@ -60,6 +68,31 @@
padding-top: 10px;
padding-bottom: 10px;
font-family: 'Roboto', sans-serif;
border-left: 3px solid transparent;
transition: 100ms;
transition-timing-function: linear;
&:hover{
border-color: rgb(80, 209, 160);
}
&:focus{
border-color: rgb(80, 209, 160);
}
}
.error-text{
padding-left: 23px;
}
}
.input-error{
border-color: rgb(255, 45, 45) !important;
}
.error-text{
color:rgb(255, 45, 45);
font-weight: bold;
cursor: text;
}
}