node. js Uploading Pictures

Dependent Library Connect,gm,imagemagick,image-size

Connect: Middleware

Gm,imagemagick: Used to process images such as zooming, cutting, adding text watermarks, etc.

Image-szie: Get the picture's width height

Image upload processing service, save Server.js

var http = require ("http");
var connect = require ("Connect");
var url = require ("url");
var fs = require ("FS");

var imagesize = require ("Image-size");
var GM = require ("GM");
var ImageMagick = Gm.subclass ({imagemagick:true});

var oldimgname;
var app = connect (). Use (function (req, res, next) {
var list = [];
var len = 0;
var pathName = Url.parse (req.url). PathName;
PathName = pathname.substring (1, pathname.length);
Oldimgname = Req.headers.imgname;
Req.on ("Error", function (Err) {
Console.log (ERR);
});
Req.on ("Data", function (chunk) {
List.push (chunk);
Len + = Chunk.length;
});
Req.on ("End", function () {
var buf = buffer.concat (list, len);
Req.data = {"path": PathName, "buf": buf};
Next ();
});
}). Use (function (req, res, next) {
if (Req.data.path = = = "Upload" && oldimgname) {
Fs.writefilesync ("./img/new_" +oldimgname, req.data.buf);

Take picture width high
var imageinfo = ImageSize ("./img/new_" +oldimgname);
Console.log (Imageinfo.width, imageinfo.height);

Print watermarks
var imgm = ImageMagick ("./img/new_" +oldimgname);
Imgm.fill ("Blue");
Imgm.fontsize (30);
Imgm.drawtext (+, Date.now (). toString ());
Imgm.write ("./img/new_" +oldimgname, function (err) {
if (err) {
Console.log (ERR);
}
});

Picture Cutting
var imgM2 = ImageMagick ("./img/new_" +oldimgname);
Imgm2.crop (300, 300, 0, 0);//Do Cutting
Imgm2.write ("./img/new_mid_" +oldimgname, function (err) {
if (err) {
Console.log (ERR);
}
});

Fs.writefilesync ("./img/new_min_" +oldimgname, req.data.buf);
var imgm_min = ImageMagick ("./img/new_min_" +oldimgname);
Imgm_min ("Img.png"). Crop (width, height, x, y)//do Cutting
! = Force Scaling
Imgm_min.resize (200, 200, "!"). Autoorient (). Write ("./img/new_min_" +oldimgname, function (err) {
if (err) {
Console.log (ERR);
}
});
}
Next ();
}). Use (function (req, res) {
Res.writehead, {"Content-type": "Text/plain; Charset=utf-8 "});
Res.write ("ending");
Res.end ();
});

Http.createserver (APP). Listen (7650);
Console.log ("Start ..." + 7650);

Client Request Save Code Test.js

var http = require ("http");
var fs = require ("FS");

var Imgpath = "./12306.jpg";

var data = Fs.readfilesync (Imgpath);

var options = {
"hostname": "127.0.0.1",
"Port": 7650,
"Path": "/upload",
"Method": "Post",
"Headers": {
"Content-type": "Application/octet-stream",
"Imgname": "12306.jpg"
}
};
var req = http.request (options, function (res) {
Res.on (' Data ', function (chunk) {
if (res.statuscode! = 200) {
Console.log ("Reqest error");
}else{
Console.log (Chunk.tostring ());
}
});
});
Req.write (data);
Req.end ();

node. js Uploading Pictures