org.springframework.http.HttpMethod#matches ( )源码实例Demo

/**
 * Check the HTTP request method (or the method from the
 * {@code Access-Control-Request-Method} header on a pre-flight request)
 * against the configured allowed methods.
 * @param requestMethod the HTTP request method to check
 * @return the list of HTTP methods to list in the response of a pre-flight
 * request, or {@code null} if the supplied {@code requestMethod} is not allowed
 */
public List<HttpMethod> checkHttpMethod(HttpMethod requestMethod) {
	if (requestMethod == null) {
		return null;
	}
	List<String> allowedMethods =
			(this.allowedMethods != null ? this.allowedMethods : new ArrayList<String>());
	if (allowedMethods.contains(ALL)) {
		return Collections.singletonList(requestMethod);
	}
	if (allowedMethods.isEmpty()) {
		allowedMethods.add(HttpMethod.GET.name());
	}
	List<HttpMethod> result = new ArrayList<HttpMethod>(allowedMethods.size());
	boolean allowed = false;
	for (String method : allowedMethods) {
		if (requestMethod.matches(method)) {
			allowed = true;
		}
		HttpMethod resolved = HttpMethod.resolve(method);
		if (resolved != null) {
			result.add(resolved);
		}
	}
	return (allowed ? result : null);
}
 

@Nullable
private RequestMethodsRequestCondition matchRequestMethod(String httpMethodValue) {
	HttpMethod httpMethod = HttpMethod.resolve(httpMethodValue);
	if (httpMethod != null) {
		for (RequestMethod method : getMethods()) {
			if (httpMethod.matches(method.name())) {
				return requestMethodConditionCache.get(method.name());
			}
		}
		if (httpMethod == HttpMethod.HEAD && getMethods().contains(RequestMethod.GET)) {
			return requestMethodConditionCache.get(HttpMethod.GET.name());
		}
	}
	return null;
}
 

@Nullable
private RequestMethodsRequestCondition matchRequestMethod(@Nullable HttpMethod httpMethod) {
	if (httpMethod != null) {
		for (RequestMethod method : getMethods()) {
			if (httpMethod.matches(method.name())) {
				return new RequestMethodsRequestCondition(method);
			}
		}
		if (httpMethod == HttpMethod.HEAD && getMethods().contains(RequestMethod.GET)) {
			return GET_CONDITION;
		}
	}
	return null;
}
 

@Nullable
private RequestMethodsRequestCondition matchRequestMethod(String httpMethodValue) {
	HttpMethod httpMethod = HttpMethod.resolve(httpMethodValue);
	if (httpMethod != null) {
		for (RequestMethod method : getMethods()) {
			if (httpMethod.matches(method.name())) {
				return new RequestMethodsRequestCondition(method);
			}
		}
		if (httpMethod == HttpMethod.HEAD && getMethods().contains(RequestMethod.GET)) {
			return GET_CONDITION;
		}
	}
	return null;
}
 

private RequestMethodsRequestCondition matchRequestMethod(String httpMethodValue) {
	HttpMethod httpMethod = HttpMethod.resolve(httpMethodValue);
	if (httpMethod != null) {
		for (RequestMethod method : getMethods()) {
			if (httpMethod.matches(method.name())) {
				return new RequestMethodsRequestCondition(method);
			}
		}
		if (httpMethod == HttpMethod.HEAD && getMethods().contains(RequestMethod.GET)) {
			return GET_CONDITION;
		}
	}
	return null;
}