Question

成功登录后，我正在使用此方法设置授权标头

router.post('/attempt', function (req, res, next) {
.....
.....
req.headers.authorization = 'JWT ' + token;
console.trace(req.headers.authorization)

，调试后我可以看到它设置正确。因此，我尝试在相同的路由上调试相同的标头，但要先设置

router.post('/attempt', function (req, res, next) {
    console.error(req.headers.authorization)

但是它是undefined。怎么可能？设置好了，页面重新加载后清除了吗？

Answer 1

如果您想将标题发送到浏览器，请像

一样使用

import java.util.Arrays;
import java.util.Scanner;

public class String2intArray {

    public static void main(String[] args) {
        System.out.println(Arrays.toString(str2ia("6,8 ,9 , 10")));
        System.out.println(Arrays.toString(str2ia("1002")));
        System.out.println(Arrays.toString(str2ia("")));
        System.out.println(Arrays.toString(str2ia(", 2")));
        System.out.println(Arrays.toString(str2ia("one,two")));
        System.out.println(Arrays.toString((str2ia("1,,2"))));
        System.out.println(Arrays.toString(str2ia("1 , 2 ,")));  
    }

    public static int[] str2ia(String s) {
        int arraylengt = 0;
        int arrayindex = 0;
        Scanner scan = new Scanner(s).useDelimiter(" *, *");

        if(s.length() == 0) {
            int[] emptyArray = {};
            System.out.print("empty array ");
            return emptyArray;
        }

        while (scan.hasNext()) {
            if (scan.hasNextInt()) {
                int nextInt = scan.nextInt();
                arraylengt ++;
            } else {
                // discard next token
                scan.next(); 
            }
        }

        int[] intArray = new int[arraylengt];

        Scanner scan2 = new Scanner(s).useDelimiter(" *, *");
        try {
            while (scan2.hasNext()) {
                if (scan2.hasNextInt()) {
                    intArray[arrayindex] = scan2.nextInt();
                    arrayindex++; 
                } else {
                    // discard next token
                    throw new IllegalArgumentException("Bad input");
                }    
            }
        } catch (IllegalArgumentException e) {
            System.out.print("Bad input");
            int[] emptyArray = {};
            return emptyArray;
        }

        return intArray;
    }

}

res.set();

但是，如果您想从请求中获取标头，请使用res.set('authorization', 'JWT ' + token);对象，如

req.headers

页面重新加载后表示无法保存标题

1 个答案: