为了体验.net在linux上运行，所以使用httpclient东借西抄做了一个简单的api上传功能。
第一步，简单的上传功能：
public class uploadhelper
{
private static readonly string controller = "/api/upload";
/// <summary>
/// 使用httpclient上传附件
/// </summary>
/// <param name="filepath"></param>
/// <returns></returns>
public static async task<string> upload(string filepath)
{
filestream filestream = new filestream(filepath, filemode.open, fileaccess.read, fileshare.read);
httpcontent httpcontent = new streamcontent(filestream);
httpcontent.headers.contenttype = mediatypeheadervalue.parse("multipart/form-data");
string filename = filepath.substring(filepath.lastindexof("\\") + 2);
namevaluecollection namevaluecollection = new namevaluecollection();
namevaluecollection.add("user-agent", "user-agent mozilla/5.0 (windows nt 10.0; wow64; trident/7.0; touch; malnjs; rv:11.0) like gecko");
using (multipartformdatacontent mulcontent = new multipartformdatacontent("----webkitformboundaryrxrbklheecbfhiy"))
{
mulcontent.add(httpcontent, "file", filename);
string ip = configurationprovider.configuration.getsection("webapi:httpaddresss").value;
string url = "http://"+ip + controller;
return await httphelper.posthttpclient(url, namevaluecollection, mulcontent);
}
}
}
public class httphelper
{
/// <summary>
/// httpclient post请求
/// </summary>
/// <param name="url"></param>
/// <param name="requestheaders"></param>
/// <param name="multipartformdatacontent"></param>
/// <returns></returns>
public static async task<string> posthttpclient(string url, namevaluecollection requestheaders,
multipartformdatacontent multipartformdatacontent)
{
var handler = new httpclienthandler();
handler.servercertificatecustomvalidationcallback = delegate { return true; };
using (httpclient client = new httpclient(handler))
{
client.maxresponsecontentbuffersize = 256000;
client.defaultrequestheaders.add(requestheaders.keys[0],requestheaders[requestheaders.keys[0]]);
httpresponsemessage httpresponsemessage = await client.postasync(url, multipartformdatacontent);
httpresponsemessage.ensuresuccessstatuscode();
string result = httpresponsemessage.content.readasstringasync().result;
return result;
}
}
}
然后自己再写一个api程序做为服务端用来接收请求，如下代码：
[route("api/[controller]")]
[apicontroller]
public class uploadcontroller : controllerbase
{
private ihostingenvironment hostingenvironment;
public uploadcontroller(ihostingenvironment _hostingenvironment)
{
hostingenvironment = _hostingenvironment;
}
[httppost]
public iactionresult upload()
{
try
{
var imgfile = request.form.files[0];
int index = imgfile.filename.lastindexof('.');
//获取后缀名
string extension = imgfile.filename.substring(index, imgfile.filename.length - index);
string webpath = hostingenvironment.contentrootpath;
string guid = guid.newguid().tostring().replace("-", "");
string newfilename = guid + extension;
datetime datetime = datetime.now;
//linux环境目录为/{1}/
string path = string.format(@"{0}/temporaryfile/{1}/{2}/{3}", "/home/www", datetime.year.tostring(), datetime.month.tostring()
, datetime.day.tostring());
if (!directory.exists(path))
directory.createdirectory(path);
string imgsrc = path + @"/" + newfilename;
using (filestream fs = system.io.file.create(imgsrc))
{
imgfile.copyto(fs);
fs.flush();
}
return new jsonresult(new { message = "ok", code = 200 });
}
catch (exception e)
{
return new jsonresult(new {message=e.message,code=500});
}
}
api程序记得修改program.cs
public class program
{
public static void main(string[] args)
{
createwebhostbuilder(args).build().run();
}
//本地启动
//public static iwebhostbuilder createwebhostbuilder(string[] args) =>
// webhost.createdefaultbuilder(args).useurls("http://*:5000")
// .usestartup<startup>();
//linux启动
public static iwebhostbuilder createwebhostbuilder(string[] args) =>
webhost.createdefaultbuilder(args)
.usestartup<startup>();
}
当时我访问出现502就是因为这个原因
然后本地测试可以之后再将api部署到linux服务器，部署linux需要一下工具：
xftp:将发布好的api程序传到linux，
ngnix：反向代理，参考菜鸟教程，我的配置是这个，记得将5000加入防火墙，并且网络策略这个端口：
user www www;
worker_processes 2; #设置值和cpu核心数一致
error_log /usr/local/webserver/nginx/logs/nginx_error.log crit; #日志位置和日志级别
pid /usr/local/webserver/nginx/nginx.pid;
#specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 65535;
events
{
use epoll;
worker_connections 65535;
}
http
{
#下面是server虚拟主机的配置
server {
listen 80;
location / {
proxy_pass http://localhost:5000;
proxy_http_version 1.1;
proxy_set_header upgrade $http_upgrade;
proxy_set_header connection keep-alive;
proxy_set_header host $host;
proxy_cache_bypass $http_upgrade;
}
}
}
具体的部署过程网上很多教程。部署好之后就可以试着用postman或浏览器输入地址访问了。
因为linux的机制当你退出linux后就无法访问，所以需要配置进程守护，我的配置如下
[program:blogapi] command=dotnet blogapi.dll directory=/home/wwwroot/blogapi/ stderr_logfile=/var/log/blogapi.error.log stdout_logfile=/var/log/blogapi.stdout.log environment=aspnetcore_environment=production user=root stopsignal=int autostart=true autorestart=true startsecs=3
更新重启守护进程，然后你就可以随时随地访问了，
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