用参数插入nodejs mssql

• Z时代
• 2024-01-10
• 分类：问答

我是NodeJS的新手，在那里我尝试使用参数插入到表中，这样我就可以避免SQL注入并只转义任何可能引起问题的字符。

因此，我目前有一个无需参数即可插入数据的应用程序。

这是我到目前为止的内容：

var fs = require('fs');
var sql = require('mssql');
var LINQ = require("node-linq").LINQ;
const simpleParser = require('mailparser').simpleParser;
var Client = require('yapople').Client;
var client = new Client({
  hostname: 'xxxxxx',
  port:  995,
  tls: true,
  mailparser: true,
  username: 'xxxxx',
  password: 'xxxxx'
});
const config = {
    user: 'xxxxxxx',
    password: 'xxxxx',
    server: 'xxxxx\\',
    port: 'xxxxx'
    database: 'xxxxxx',
    options: {
        instanceName: 'xxxxx'
    }
};
(async function () {
    try {
        let pool = await sql.connect(config)
        //Get all current emails
        let emails = await pool.request()
            .query('select uid from email')
        //Get uids only
        var uids = new LINQ(emails.recordset)
        .Select(function(email) {return email.uid;})
        .ToArray();
        //Get all emails
        client.connect(function() {
            client.retrieveAll(function(err, messages) {
                messages.forEach(function(message) {
                    //Check if the message exists in our database already.
                    var messageId = message.messageId;
                    var emailExists = new LINQ(uids)
                        .Where(x=>x == messageId).ToArray();
                    //If the message do not exists then add them to the database
                    if(emailExists.length == 0){
                        var sentDate = new Date(message.date).toISOString();
                        var subject = message.subject;
                        var body = message.text;
                        var mailAddress = "";
                        var mailAddressName = "";
                        if(message.from.length > 0){
                            mailAddress = message.from[0].address;
                            mailAddressName = message.from[0].name;
                        }
                       const request = pool.request();
                    request.input('uid', sql.VarChar, messageId);
                    request.input('mail_address', sql.VarChar, mailAddress);
                    request.input('mail_address_display_name', sql.VarChar, mailAddressName);
                    request.input('subject', sql.VarChar, subject);
                    request.input('body', sql.VarChar, body);
                    request.input('sent_date', sql.DateTime, sentDate);
                    request.input('created_by', sql.VarChar, 'system');
                    let result = await request.query('INSERT INTO email(uid, mail_address, mail_address_display_name, subject, body, sent_date, created_by) OUTPUT INSERTED.ID values (@uid, @mail_address, @mail_address_display_name, @subject, @body, @sent_date, @created_by)', (err, result) => {
                        console.dir(result)
                    })
                    }
                });
                client.quit();
            })
        });
    } catch (err) {
        console.log(err);
        // ... error checks
    }
})()

我正在查看准备好的语句，但无法正常工作。

这是我尝试使用准备好的语句的结果

const ps = new sql.PreparedStatement();
                        ps.input('uid', TYPES.VarChar);  
                        ps.input('mail_address', TYPES.VarChar);  
                        ps.input('mail_address_display_name', TYPES.VarChar);
                        ps.input('subject', TYPES.VarChar);
                        ps.input('body', TYPES.VarChar);
                        ps.input('sent_date', TYPES.DateTime);
                        ps.input('created_by', TYPES.VarChar);
                        ps.prepare('INSERT INTO email(uid, mail_address, mail_address_display_name, subject, body, sent_date, created_by) ' +
                        ' OUTPUT INSERTED.email_id VALUES (@uid, @mail_address, @mail_address_display_name, @subject, @body, @sent_date, @created_by)', 
                            err => {
                                    ps.execute({uid: messageId, 
                                                mail_address: mailAddress, 
                                                mail_address_display_name:mailAddressName,
                                                subject: subject,
                                                body: body,
                                                sent_date: sentDate,
                                                created_by: 'system'
                                            }, (err, result) => {
                                        // ... error checks
                                    ps.unprepare(err => {
                                    var x =1;
                                    })
                                })
                            })

回答：

您可以使用连接池请求对象添加参数，例如

const request = pool.request()
request.input('myval', sql.VarChar, 'value')
request.query('insert into testtable (somecolumn) values (@myval)', (err, result) => {
    console.dir(result)
})

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