当我上传图片时出现此错误:
超出最大请求长度
如何解决此问题?
答案 0 :(得分:55)
将以下内容添加到您的web.config文件中:
<configuration>
<system.web>
<httpRuntime maxRequestLength ="2097151"/>
</system.web>
</configuration>
这将它设置为2GB。不确定最大值是什么。
答案 1 :(得分:21)
您可以在<system.web>
:
<httpRuntime maxRequestLength="100000" />
此示例将最大大小设置为100 MB。
答案 2 :(得分:9)
这不是一个很好的方法,因为你基本上打开你的服务器DoS attacks,允许用户提交巨大的文件。如果您知道用户应该只上传特定大小的图像,那么您应该强制执行该操作,而不是将服务器打开以进行更大规模的提交。
为此,您可以使用以下示例。
由于我一直呻吟着发布一个链接,我已经添加了我最终使用我从之前发布的链接中学到的东西 - 这已经过测试并在我自己的网站上运行...它假设一个默认限制为4 MB。你可以实现这样的东西,或者使用某种第三方ActiveX控制。
请注意,在这种情况下,如果用户提交的内容太大,我会将用户重定向到错误页面,但如果您愿意,则无法阻止您进一步自定义此逻辑。
我希望它有用。
public class Global : System.Web.HttpApplication {
private static long maxRequestLength = 0;
/// <summary>
/// Returns the max size of a request, in kB
/// </summary>
/// <returns></returns>
private long getMaxRequestLength() {
long requestLength = 4096; // Assume default value
HttpRuntimeSection runTime = ConfigurationManager.GetSection("system.web/httpRuntime") as HttpRuntimeSection; // check web.config
if(runTime != null) {
requestLength = runTime.MaxRequestLength;
}
else {
// Not found...check machine.config
Configuration cfg = ConfigurationManager.OpenMachineConfiguration();
ConfigurationSection cs = cfg.SectionGroups["system.web"].Sections["httpRuntime"];
if(cs != null) {
requestLength = Convert.ToInt64(cs.ElementInformation.Properties["maxRequestLength"].Value);
}
}
return requestLength;
}
protected void Application_Start(object sender, EventArgs e) {
maxRequestLength = getMaxRequestLength();
}
protected void Application_End(object sender, EventArgs e) {
}
protected void Application_Error(object sender, EventArgs e) {
Server.Transfer("~/ApplicationError.aspx");
}
public override void Init() {
this.BeginRequest += new EventHandler(Global_BeginRequest);
base.Init();
}
protected void Global_BeginRequest(object sender, EventArgs e) {
long requestLength = HttpContext.Current.Request.ContentLength / 1024; // Returns the request length in bytes, then converted to kB
if(requestLength > maxRequestLength) {
IServiceProvider provider = (IServiceProvider)HttpContext.Current;
HttpWorkerRequest workerRequest = (HttpWorkerRequest)provider.GetService(typeof(HttpWorkerRequest));
// Check if body contains data
if(workerRequest.HasEntityBody()) {
// Get the total body length
int bodyLength = workerRequest.GetTotalEntityBodyLength();
// Get the initial bytes loaded
int initialBytes = 0;
if(workerRequest.GetPreloadedEntityBody() != null) {
initialBytes = workerRequest.GetPreloadedEntityBody().Length;
}
if(!workerRequest.IsEntireEntityBodyIsPreloaded()) {
byte[] buffer = new byte[512000];
// Set the received bytes to initial bytes before start reading
int receivedBytes = initialBytes;
while(bodyLength - receivedBytes >= initialBytes) {
// Read another set of bytes
initialBytes = workerRequest.ReadEntityBody(buffer, buffer.Length);
// Update the received bytes
receivedBytes += initialBytes;
}
initialBytes = workerRequest.ReadEntityBody(buffer, bodyLength - receivedBytes);
}
}
try {
throw new HttpException("Request too large");
}
catch {
}
// Redirect the user
Server.Transfer("~/ApplicationError.aspx", false);
}
}
答案 3 :(得分:0)
为避免超出最大请求长度,请不要上传大尺寸图片或将图片大小减小100kb至200kb之间。