nginx服务器实现上传下载文件

参考

Nginx文件服务器
 使用nginx搭建文件服务器
 使用nginx作为文件服务器
 nginx搭文件服务器
 利用nginx搭建小型的文件服务器
 Nginx文件上传下载实现与文件管理
 nginx上传模块nginx_upload_module和nginx_uploadprogress_module模块进度显示，如何传递GET参数等。
nginx上传模块nginx_upload_module使用
 加上上传模块的nginx编译和配置
 nginx upload模块+python 后端处理模仿fastdfs实现文件存取
 实现Nginx Upload 模块功能上传文件。
Upload module官网
 github Upload module官网
 NGINX Upload Progress Module
github Upload Progress Module
www/nginx unknown directive “upload_progress” after upgrade 1.12.2_4,2 -> 1.12.2_6,2

下载

更新配制文件，添加如下字段，这里用alias实现把嵌入式开发板的根目录全部映射过去，

location /download {
    alias   /;
    autoindex on; 
    autoindex_localtime on;
    autoindex_exact_size off;
}

执行，

$ ./nginx/sbin/nginx -p ./nginx -s reload

上传

需要有nginx的源码，重新编译nginx，添加上传模块，上传进度模块，

$ ./configure --add-module=$parent_path/nginx-upload-module-2.3.0 --add-module=$parent_path/nginx-upload-progress-module-0.8.4
$ make
$ make install

注意上传进度模块，到0.9版本有一个不兼容的更改，

in version 0.9.0 there is INCOMPATIBLE CHANGE: JSONP is now the default output of the progress probes. If you rely on this module serving the deprecated java output use:

upload_progress_java_output
in the progress probe location.

添加配置文件，

location /upload {  
    upload_pass     /;  
    # upload_cleanup 400 404 499 500-505;  
    upload_store    /boot;  
    upload_store_access user:rw;  
    # upload_limit_rate 128k;  
    upload_set_form_field "${upload_field_name}_name" $upload_file_name;  
    upload_set_form_field "${upload_field_name}_content_type" $upload_content_type;  
    upload_set_form_field "${upload_field_name}_path" $upload_tmp_path;  
    upload_aggregate_form_field "${upload_field_name}_md5" $upload_file_md5;  
    upload_aggregate_form_field "${upload_field_name}_size" $upload_file_size;  
    upload_pass_form_field "^.*$";  
}

建立html测试，使用fcgi，

printf("<form method="POST" enctype="multipart/form-data" action="uploademmc"n");
printf("<p>File Upload:n");
printf("<input type="file" name="file" value="">n");
printf("<p>n");
printf("<input type="submit" name="uploademmc" value="uploademmc">n");
printf("<p>n");
printf("</form>n");

上传，0000000001即为新上传的文件，这里必须用脚本在上传结束后来执行重命名操作，

root@zynqmp:~# ls -l /boot
total 53172
-rw-------    1 root     root         31428 Jan 26 16:11 0000000001
-rw-r--r--    1 root     root      14283264 Jan 26 12:06 Image
-rwxr-xr-x    1 root     root      19311212 Jan  1  1970 MWM178_V1_U6_V1.bit
-rw-r--r--    1 root     root       1118392 Jan 26 06:47 boot.bin
-rw-r--r--    1 root     root      19634147 Jan 26 00:56 rootfs.ext4.gz.uboot
-rw-r--r--    1 root     root         29091 Jan 26 06:47 system.dtb

上传使用post方法，后端接收到的字符串为如下格式，可以看到文件名在file_name字段中，可利用环境变量REQUEST_URI提取出来即可，

------WebKitFormBoundarygKAThjQRpvOwowzR
Content-Disposition: form-data; name="file_name"

11.PNG
------WebKitFormBoundarygKAThjQRpvOwowzR
Content-Disposition: form-data; name="file_content_type"

image/png
------WebKitFormBoundarygKAThjQRpvOwowzR
Content-Disposition: form-data; name="file_path"

/boot/0023791667
------WebKitFormBoundarygKAThjQRpvOwowzR
Content-Disposition: form-data; name="file_md5"

0276e88e6161ac806d46ee0afb45976e
------WebKitFormBoundarygKAThjQRpvOwowzR
Content-Disposition: form-data; name="file_size"

17734
------WebKitFormBoundarygKAThjQRpvOwowzR
Content-Disposition: form-data; name="uploademmc"

uploademmc
------WebKitFormBoundarygKAThjQRpvOwowzR--

FCGI_ROLE=RESPONDER
SCRIPT_FILENAME=./nginx/html/index.cgi
QUERY_STRING=
REQUEST_METHOD=POST
CONTENT_TYPE=multipart/form-data; boundary=----WebKitFormBoundarygKAThjQRpvOwowzR
CONTENT_LENGTH=706
SCRIPT_NAME=/index.cgi
REQUEST_URI=/uploademmc

上传进度模块需要前端js协助，配置文件，前面提到的0.9版本有一个不兼容的更改，如果需要和老版本兼容，需要在location ^~ /progress中添加upload_progress_java_output，

http {
    ...
    upload_progress proxied 5m;
    
    server {
        ...

        location = / {
            fastcgi_pass 127.0.0.1:8088;
            fastcgi_index index.cgi;
            include fastcgi.conf;
        }

        location /download {
            alias   /;
            autoindex on; 
            autoindex_localtime on;
            autoindex_exact_size off;
        } 

        location /upload {  
            upload_pass     /;  
            # upload_cleanup 400 404 499 500-505;  
            upload_store    /boot;  
            upload_store_access user:rw;  
            # upload_limit_rate 128k;  
            client_max_body_size 8g;
            upload_set_form_field "${upload_field_name}_name" $upload_file_name;  
            upload_set_form_field "${upload_field_name}_content_type" $upload_content_type;  
            upload_set_form_field "${upload_field_name}_path" $upload_tmp_path;  
            upload_aggregate_form_field "${upload_field_name}_md5" $upload_file_md5;  
            upload_aggregate_form_field "${upload_field_name}_size" $upload_file_size;  
            upload_pass_form_field "^.*$";  
            track_uploads proxied 30s;
        }

        location ^~ /progress {
            # report uploads tracked in the 'proxied' zone
            report_uploads proxied;
            # upload_progress_java_output;
        }

        location ~ .js$ {
            root html;
        }

设置参数client_max_body_size 8g，否则上传时会报错413 Request Entity Too Large，编写html，

printf("<form id="upload" method="POST" enctype="multipart/form-data" action="upload" οnsubmit="openProgressBar(); return true;"n");
printf("<p>File Upload:n");
printf("<input type="file" name="file" value="">n");
printf("<p>n");
printf("<input type="submit" name="upload" value="upload">n");
printf("<p>n");
printf("</form>n");
printf("<div>n");
printf("<div id="progress" style="width: 400px; border: 1px solid black">n");
printf("<div id="progressbar" style="width: 1px; background-color: blue; border: 1px solid white">&nbsp;</div>n");
printf("</div>n");
printf("<div id="tp">(progress)</div>n");
printf("</div>n");

添加js文件，

interval = null;

function openProgressBar() {
 /* generate random progress-id */
 uuid = "";
 for (i = 0; i < 32; i++) {
  uuid += Math.floor(Math.random() * 16).toString(16);
 }
 /* patch the form-action tag to include the progress-id */
 document.getElementById("upload").action="/upload?X-Progress-ID=" + uuid;

 /* call the progress-updater every 1000ms */
 interval = window.setInterval(
   function () {
     fetch(uuid);
   },
   1000
 );
}

function fetch(uuid) {
 req = new XMLHttpRequest();
 req.open("GET", "/progress", 1);
 req.setRequestHeader("X-Progress-ID", uuid);
 req.onreadystatechange = function () {
  if (req.readyState == 4) {
   if (req.status == 200) {
    /* poor-man JSON parser */
    var upload = eval(req.responseText);

    document.getElementById('tp').innerHTML = upload.state;

    /* change the width if the inner progress-bar */
    if (upload.state == 'done' || upload.state == 'uploading') {
     bar = document.getElementById('progressbar');
     w = 400 * upload.received / upload.size;
     bar.style.width = w + 'px';
    }
    /* we are done, stop the interval */
    if (upload.state == 'done') {
     window.clearTimeout(interval);
    }
   }
  }
 }
 req.send(null);
}