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lighttpd：ajax 请求打印 cgi 脚本的内容而不是运行它

tag-icon • tag-icon linux configuration lighttpd cgi arm
lighttpd：ajax 请求打印 cgi 脚本的内容而不是运行它

我在 ARM 环境中使用 lighttpd 版本 1.4.55。我创建了一个 HTML 页面，其中有一个按钮用于下载一些 json 数据。此按钮触发一个调用 cgi 脚本的提交表单。此脚本必须获取表单的输出并写入文件。但是当我单击按钮时，xhr 请求的响应文本是 cgi 脚本的内容，而不是 printf 消息。cgi 具有执行权限。

我按以下方式划分文件夹：•mnt/userfs/lighttpd/

•www
    • /scripts_files
        •json.cgi
    • /html_files
        •css folder
        •js folder
    • upload_dir
    • index.html
    • /admin
        • password_file
        • main.html
        • file_upload.html
    • /user
        • password_file
        • main.html
        • file_upload.html
•lighttpd.conf
•log
    •error.log

调用表单的按钮如下：

<a href="/scripts_files/conf.json" download="data.json">            
    <input type="button" value="DOWNLOAD" onclick="submit_form();">
</a>

该按钮调用一个函数，然后下载用.cgi 脚本创建的文件。

ajax请求的作用：

function submit_form()
    {
        var div1 = document.getElementById("extern");
        var data = {};
        data = recursive_f(div1, 0, 0);
        output = JSON.stringify(data);
        var xhr_lv = new XMLHttpRequest();
        xhr_lv.onreadystatechange=function()
        xhr_lv.open("POST", "/scripts_files/json.cgi", true);
        xhr_lv.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
        xhr_lv.send(output);
    }

生成.cgi脚本的C程序：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(int argc, char* argv[])
{
    char* post_len_v = getenv("CONTENT_LENGTH");
    long post_len = strtol(post_len_v, NULL, 10);
    char* post_msg = (char*)malloc(post_len + 1);
    FILE *fp;


    if (!post_msg)
    { 
        return 0; 
    }
    fgets(post_msg, post_len + 1, stdin);      

    fp = fopen("/mnt/userfs/lighttpd/www/scripts_files/conf.json", "w");

    fprintf(fp, "%s", post_msg);
    fclose(fp);

    printf("Content-type: text/html\n\n");
    printf("{'ret': 'OK'}");

    return 0;
}

Lighttpd配置文件：

server.modules              = (
                "mod_indexfile",
                "mod_access",
                "mod_redirect",
                "mod_alias",
                "mod_compress",
                "mod_dirlisting",
                "mod_staticfile",
                "mod_auth",
                "mod_authn_file",
                "mod_accesslog",
                "mod_cgi",
                #"mod_rewrite",
                #"mod_status"
                #"mod_fastcgi"
)

server.document-root        = "/mnt/userfs/lighttpd/www"


server.errorlog             = "/mnt/userfs/lighttpd/log/error.log"
server.breakagelog         = "/mnt/userfs/lighttpd/log/breakage.log"

index-file.names            = ("index.html", "main.html", "file_upload.html")

mimetype.assign = (
    ".class" => "application/java-vm",
    ".js" => "application/javascript",
    ".mjs" => "application/javascript",
    ".json" => "application/json",
    ".jsonld" => "application/ld+json",
    ".wmx" => "video/x-ms-wmx",
    ".wvx" => "video/x-ms-wvx",
    ".avi" => "video/x-msvideo",
    ".movie" => "video/x-sgi-movie",
    ".ice" => "x-conference/x-cooltalk",
    ".sisx" => "x-epoc/x-sisx-app",
    ".vrm" => "x-world/x-vrml",
    "README" => "text/plain; charset=utf-8",
    "Makefile" => "text/x-makefile; charset=utf-8",
    
    # enable caching for unknown mime types:
    #"" => "application/octet-stream"
)

mimetype.use-xattr        = "disable" 

url.access-deny             = ( "~", ".inc" )

static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )

server.port                = 80

server.username            = "midac"
server.groupname           = "midac"

#compress.cache-dir          = "/var/cache/lighttpd/compress/"
compress.filetype           = ( "application/javascript", "text/css", "text/html", "text/plain" )

cgi.assign = ( ".cgi" => "" )

$HTTP["url"] =~ "/admin" {
auth.backend = "htpasswd"
auth.backend.htpasswd.userfile = "/mnt/userfs/lighttpd/www/admin/.htpasswd"
auth.require = ( "/admin" => (
    "method" => "basic", 
    "realm" => "main", 
    "require" => "valid-user") 
)
}

$HTTP["url"] =~ "/user" {
auth.backend = "htpasswd"
auth.backend.htpasswd.userfile = "/mnt/userfs/lighttpd/www/user/.htpasswd"
auth.require = ( "/user" => (
    "method" => "basic", 
    "realm" => "main", 
    "require" => "valid-user") 
)
}

$HTTP["url"] =~ "/user2" {
auth.backend = "htpasswd"
auth.backend.htpasswd.userfile = "/mnt/userfs/lighttpd/www/user2/.htpasswd"
auth.require = ( "/user2" => (
    "method" => "basic", 
    "realm" => "main", 
    "require" => "valid-user") 
)
}

我也尝试使用示例 cgi 脚本，但得到了以下结果：

#!/bin/sh

echo hello

所以cgi脚本的内容。

POST 请求的类型是八位字节流，似乎 cgi_mod 工作不正常，或者我错过了 lighttpd 配置文件中的某些内容。

有什么建议可以解决这个问题吗？

答案1

"mod_cgi"server.modules必须在、 之前"mod_staticfile"和 之前列出"mod_dirlisting"。

您的错误在于“mod_staticfile”在“mod_cgi”有机会处理请求之前就处理了请求。

lighttpd 1.4.55 已过时。如果您运行的是 lighttpd 的现代版本，例如 lighttpd 1.4.71，lighttpd -f /etc/lighttpd/lighttpd.conf -tt则会检测到该错误并向您发出警告。

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