spring boot firefox 聊聊springboot tomcat的maxHttpFormPostSize

序

本文主要研究一下spring boot tomcat的maxHttpFormPostSize参数

parseParameters

tomcat-embed-core-9.0.37-sources.jar!/org/apache/catalina/connector/Request.java

/**

* Parse request parameters.

protected void parseParameters() {

parametersParsed = true;

Parameters parameters = coyoteRequest.getParameters();

boolean success = false;

try {

// Set this every time in case limit has been changed via JMX

parameters.setLimit(getConnector().getMaxParameterCount());

// getCharacterEncoding() may have been overridden to search for

// hidden form field containing request encoding

Charset charset = getCharset();

boolean useBodyEncodingForURI = connector.getUseBodyEncodingForURI();

parameters.setCharset(charset);

if (useBodyEncodingForURI) {

parameters.setQueryStringCharset(charset);

}

// Note: If !useBodyEncodingForURI, the query string encoding is

// that set towards the start of CoyoyeAdapter.service()

parameters.handleQueryParameters();

if (usingInputStream || usingReader) {

success = true;

return;

}

String contentType = getContentType();

if (contentType == null) {

contentType = "";

}

int semicolon = contentType.indexOf(';');

if (semicolon >= 0) {

contentType = contentType.substring(0, semicolon).trim();

} else {

contentType = contentType.trim();

}

if ("multipart/form-data".equals(contentType)) {

parseParts(false);

success = true;

return;

}

if( !getConnector().isParseBodyMethod(getMethod()) ) {

success = true;

return;

}

if (!("application/x-www-form-urlencoded".equals(contentType))) {

success = true;

return;

}

int len = getContentLength();

if (len > 0) {

int maxPostSize = connector.getMaxPostSize();

if ((maxPostSize >= 0) && (len > maxPostSize)) {

Context context = getContext();

if (context != null && context.getLogger().isDebugEnabled()) {

context.getLogger().debug(

sm.getString("coyoteRequest.postTooLarge"));

}

checkSwallowInput();

parameters.setParseFailedReason(FailReason.POST_TOO_LARGE);

return;

}

byte[] formData = null;

if (len < CACHED_POST_LEN) {

if (postData == null) {

postData = new byte[CACHED_POST_LEN];

}

formData = postData;

} else {

formData = new byte[len];

}

try {

if (readPostBody(formData, len) != len) {

parameters.setParseFailedReason(FailReason.REQUEST_BODY_INCOMPLETE);

return;

}

} catch (IOException e) {

// Client disconnect

Context context = getContext();

if (context != null && context.getLogger().isDebugEnabled()) {

context.getLogger().debug(

sm.getString("coyoteRequest.parseParameters"), e);

}

parameters.setParseFailedReason(FailReason.CLIENT_DISCONNECT);

return;

}

parameters.processParameters(formData, 0, len);

} else if ("chunked".equalsIgnoreCase(

coyoteRequest.getHeader("transfer-encoding"))) {

byte[] formData = null;

try {

formData = readChunkedPostBody();

} catch (IllegalStateException ise) {

// chunkedPostTooLarge error

parameters.setParseFailedReason(FailReason.POST_TOO_LARGE);

Context context = getContext();

if (context != null && context.getLogger().isDebugEnabled()) {

context.getLogger().debug(

sm.getString("coyoteRequest.parseParameters"),

ise);

}

return;

} catch (IOException e) {

// Client disconnect

parameters.setParseFailedReason(FailReason.CLIENT_DISCONNECT);

Context context = getContext();

if (context != null && context.getLogger().isDebugEnabled()) {

context.getLogger().debug(

sm.getString("coyoteRequest.parseParameters"), e);

}

return;

}

if (formData != null) {

parameters.processParameters(formData, 0, formData.length);

}

success = true;

} finally {

if (!success) {

parameters.setParseFailedReason(FailReason.UNKNOWN);

}

tomcat request解析表单参数

maxPostSize

主要是下面这段

if ((maxPostSize >= 0) && (len > maxPostSize)) {

Context context = getContext();

if (context != null && context.getLogger().isDebugEnabled()) {

context.getLogger().debug(

sm.getString("coyoteRequest.postTooLarge"));

}

checkSwallowInput();

parameters.setParseFailedReason(FailReason.POST_TOO_LARGE);

return;

}

如果大于maxPostSize，则会设置FailReason.POST_TOO_LARGE，如果开启debug日志则会打印coyoteRequest.postTooLarge的内容

postTooLarge

coyoteRequest.postTooLarge=Parameters were not parsed because the size of the posted data was too big. Use the maxPostSize attribute of the connector to resolve this if the application should accept large POSTs.

400

对于spring boot来说，请求会报400，也就是参数丢失的错误，比如

org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'arg1' is not present

at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:204)

at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:114)

at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121)

at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:652)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)