Question

我有大量的HTTP POST请求被发送到nginx服务器，然后将负载平衡到一组反向代理的node.js / express.js后端服务器。为了节省一些网络消耗，使用GZIP和头内容编码：gzip发送有效载荷。

我正在努力实现这样的目标：

[Client] [Nginx Reverse Proxy] [BackEnd] | [gziped payload] | [raw payload] | |--------------------> | ----------------------------->| | | | | [Raw Response] | [Raw response] | | <------------------ | <-----------------------------| | | |

出于效率原因，我想在Nginx运行Gunzip，但我无法这样做。这是http nginx.conf文件：

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;

    server {
        listen       80;
        server_name  localhost;
        gunzip on;
        location / {
           proxy_pass http://localhost:8080;
           proxy_http_version 1.1;
           proxy_set_header Upgrade $http_upgrade;
           proxy_set_header Connection 'upgrade';
           proxy_set_header Host $host;
           proxy_cache_bypass $http_upgrade;
          }
    }
}

以下是请求的示例：

echo "{"id": 0,"mypayload":"This is an example"}" | gzip -c - | curl -v -i -X POST -H 'Content-Encoding: gzip' --data-binary '@-' http://localhost/test

我希望nginx解压缩有效负载的内容并将原始内容传递到后端服务器，但内容仍然是压缩的。

我已经看到很多人正在做相反的事情（Nginx gziping响应甚至对没有Accept-Encoding的客户端进行枪杀响应：gzip标头）但是找不到它成功地将有效负载发送到后端。

任何线索？

Answer 1

我知道这是一个较旧的问题，但我希望对发送压缩请求的IOS客户端执行相同的操作，在查看您的问题之后，我找到了here描述的lua解决方案，并考虑发布它这里供将来参考。

lua模块如下：

-- Debian packages nginx-extras, lua-zlib required

ngx.ctx.max_chunk_size = tonumber(ngx.var.max_chunk_size)
ngx.ctx.max_body_size = tonumber(ngx.var.max_body_size)

function create_error_response (code, description)
    local message = string.format('{"status":400,"statusReason":"Bad Request","code":%d,"exception":"","description":"%s","message":"HTTP 400 Bad Request"}', code, description)
    ngx.status = ngx.HTTP_BAD_REQUEST
    ngx.header.content_type = "application/json"
    ngx.say(message)
    ngx.exit(ngx.HTTP_OK)
end


function inflate_chunk (stream, chunk)
    return stream(chunk)
end


function inflate_body (data)
    local stream = require("zlib").inflate()
    local buffer = ""
    local chunk = ""

    for index = 0, data:len(), ngx.ctx.max_chunk_size do
        chunk = string.sub(data, index, index + ngx.ctx.max_chunk_size - 1)
        local status, output, eof, bytes_in, bytes_out = pcall(stream, chunk)

        if not status then
            -- corrupted chunk
            ngx.log(ngx.ERR, output)
            create_error_response(4001, "Corrupted GZIP body")
        end

        if bytes_in == 0 and bytes_out == 0 then
            -- body is not gzip compressed
            create_error_response(4002, "Invalid GZIP body")
        end

        buffer = buffer .. output

        if bytes_out > ngx.ctx.max_body_size then
            -- uncompressed body too large
            create_error_response(4003, "Uncompressed body too large")
        end
    end

    return buffer
end


local content_encoding = ngx.req.get_headers()["Content-Encoding"]
if content_encoding == "gzip" then
    ngx.req.read_body()
    local data = ngx.req.get_body_data()

    if data ~= '' then
        local new_data = inflate_body(data)

        ngx.req.clear_header("Content-Encoding")
        ngx.req.clear_header("Content-Length")
        ngx.req.set_body_data(new_data)
    end
end

然后您就可以使用它：

location / {
        proxy_pass http://127.0.0.1:8080;
        proxy_pass_request_headers on;
        proxy_redirect off;
        proxy_set_header X-Real-IP $remote_addr;

        client_max_body_size 512k;    # Max request body size of 512 KB
        client_body_buffer_size 512k;

        set $max_chunk_size = 10240;  # Chunks of 10 KB
        set $max_body_size = 524288;  # Max inflated body size of 512 KB

        rewrite_by_lua_file inflate_body.lua;
    }

Nginx gunzip POST请求后端

1 个答案: