1 前言
项目需要用nodejs服务器给前端传递图片，网上找了好多资料，多数都是怎么在前端上传图片的，然后通过看runoob.com菜鸟教程，发现其实是非常简单，用express框架就行了。
2 代码
2.1 用原生的版本（包含了返回网页功能）
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var http = require('http');
var fs = require('fs');
var url = require('url');
// 创建服务器http.createServer( function (request, response) {
// 解析请求，包括文件名
var pathname = url.parse(request.url).pathname;
// 输出请求的文件名
console.log("Request for " + pathname + " received.");
// 从文件系统中读取请求的文件内容
fs.readFile(pathname.substr(1), function (err, data) {
var urlContent = pathname.substr(1);
if(urlContent.lastIndexOf("png") > -1){
if (err) {
console.log(err);
// HTTP 状态码: 404 : NOT FOUND
// Content Type: text/plain
response.writeHead(404, {'Content-Type': 'text/html'});
}else{
// HTTP 状态码: 200 : OK
// Content Type: text/plain
response.writeHead(200, {'Content-Type': 'image/png'});
var imageFilePath = pathname.substr(1);
var stream = fs.createReadStream( imageFilePath );
var responseData = [];//存储文件流
if (stream) {//判断状态
stream.on( 'data', function( chunk ) {
responseData.push( chunk );
});
stream.on( 'end', function() {
var finalData = Buffer.concat( responseData );
response.write( finalData );
response.end();
});
}
}
}else if(urlContent.lastIndexOf("html") > -1){
if (err) {
console.log(err);
// HTTP 状态码: 404 : NOT FOUND
// Content Type: text/plain
response.writeHead(404, {'Content-Type': 'text/html'});
}else{
// HTTP 状态码: 200 : OK
// Content Type: text/plain
response.writeHead(200, {'Content-Type': 'text/html'});
// 响应文件内容
response.write(data.toString());
}
// 发送响应数据
response.end();
}else{
console.log("unSupport Type, Please contact Administrator err url="+urlContent);
}
});
}).listen(80); |
2.2 用Express框架版本
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var express = require('express');
var app = express();
app.use(express.static('public'));
app.get('/public/images/*', function (req, res) {
res.sendFile( __dirname + "/" + req.url );
console.log("Request for " + req.url + " received.");
}) app.get('/public/html/index.html', function (req, res) {
res.sendFile( __dirname + "/" + "/public/html/index.html" );
console.log("Request for " + req.url + " received.");
})//如果访问网页和本地同名，可以使用以下版本app.get('/public/html/*.html', function (req, res) {
res.sendFile( __dirname + "/" + req.url );
console.log("Request for " + req.url + " received.");
})app.get('/public/register', function (req, res) {
res.sendFile( __dirname + "/" + "/public/html/register.html" );
console.log("Request for " + req.url + " received.");
})var server = app.listen(80, function () {
console.log('Server running at http://127.0.0.1:80/');
}) |
1 前言
项目需要用nodejs服务器给前端传递图片，网上找了好多资料，多数都是怎么在前端上传图片的，然后通过看runoob.com菜鸟教程，发现其实是非常简单，用express框架就行了。
2 代码
2.1 用原生的版本（包含了返回网页功能）
?
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
var http = require('http');
var fs = require('fs');
var url = require('url');
// 创建服务器http.createServer( function (request, response) {
// 解析请求，包括文件名
var pathname = url.parse(request.url).pathname;
// 输出请求的文件名
console.log("Request for " + pathname + " received.");
// 从文件系统中读取请求的文件内容
fs.readFile(pathname.substr(1), function (err, data) {
var urlContent = pathname.substr(1);
if(urlContent.lastIndexOf("png") > -1){
if (err) {
console.log(err);
// HTTP 状态码: 404 : NOT FOUND
// Content Type: text/plain
response.writeHead(404, {'Content-Type': 'text/html'});
}else{
// HTTP 状态码: 200 : OK
// Content Type: text/plain
response.writeHead(200, {'Content-Type': 'image/png'});
var imageFilePath = pathname.substr(1);
var stream = fs.createReadStream( imageFilePath );
var responseData = [];//存储文件流
if (stream) {//判断状态
stream.on( 'data', function( chunk ) {
responseData.push( chunk );
});
stream.on( 'end', function() {
var finalData = Buffer.concat( responseData );
response.write( finalData );
response.end();
});
}
}
}else if(urlContent.lastIndexOf("html") > -1){
if (err) {
console.log(err);
// HTTP 状态码: 404 : NOT FOUND
// Content Type: text/plain
response.writeHead(404, {'Content-Type': 'text/html'});
}else{
// HTTP 状态码: 200 : OK
// Content Type: text/plain
response.writeHead(200, {'Content-Type': 'text/html'});
// 响应文件内容
response.write(data.toString());
}
// 发送响应数据
response.end();
}else{
console.log("unSupport Type, Please contact Administrator err url="+urlContent);
}
});
}).listen(80); |
2.2 用Express框架版本
?
|
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|
var express = require('express');
var app = express();
app.use(express.static('public'));
app.get('/public/images/*', function (req, res) {
res.sendFile( __dirname + "/" + req.url );
console.log("Request for " + req.url + " received.");
}) app.get('/public/html/index.html', function (req, res) {
res.sendFile( __dirname + "/" + "/public/html/index.html" );
console.log("Request for " + req.url + " received.");
})//如果访问网页和本地同名，可以使用以下版本app.get('/public/html/*.html', function (req, res) {
res.sendFile( __dirname + "/" + req.url );
console.log("Request for " + req.url + " received.");
})app.get('/public/register', function (req, res) {
res.sendFile( __dirname + "/" + "/public/html/register.html" );
console.log("Request for " + req.url + " received.");
})var server = app.listen(80, function () {
console.log('Server running at http://127.0.0.1:80/');
}) |
