我目前正在使用Apache的HttpComponents，包括HttpAsyncClient beta，但我很想知道。如何设置HttpAsyncPost的标头？
我目前有：
HttpAsyncPost asyncRequest = new HttpAsyncPost(channel, "id=15846");
但是如何设置此请求的标头？
答案 0 :(得分：3)
如果您不介意升级到最新的快照，可以使用HttpAsyncMethods#create方法从任意HttpAsyncRequestProducer实例创建HttpUriRequest。
或者，您可以覆盖HttpAsyncPost#createRequest()方法并将自定义标头添加到超类返回的HttpEntityEnclosingRequest实例中。
希望这有帮助。
答案 1 :(得分：0)
我的第一个使用强制转换为generateRequest()的解决方案。我不能依赖方法BasicAsyncRequestProducer request = (BasicAsyncRequestProducer) HttpAsyncMethods.createPost("http://some/uri", "some payload", ContentType.DEFAULT_TEXT);
request.generateRequest().setHeader("header name", "header value");
，它基本上是吸气剂，但是随着方法名称的提示，它将来会改变。所以我坚持@oleg回答。
createPost使用我自己的基于@oleg答案的createPost("http://some/uri", "some payload", ContentType.DEFAULT_TEXT, new BasicHeader("header name", "header value"));
static class RequestProducerImpl extends BasicAsyncRequestProducer {
protected RequestProducerImpl(
final HttpHost target,
final HttpEntityEnclosingRequest request,
final HttpAsyncContentProducer producer) {
super(target, request, producer);
}
}
public static HttpAsyncRequestProducer createPost(
final String requestURI,
final String content,
final ContentType contentType, Header... headers) throws UnsupportedEncodingException {
final HttpPost httppost = new HttpPost(requestURI);
final NStringEntity entity = new NStringEntity(content, contentType);
httppost.setEntity(entity);
httppost.setHeaders(headers);
final HttpHost target = URIUtils.extractHost(URI.create(requestURI));
return new RequestProducerImpl(target, httppost, entity);
}
方法：
# split time spans into their different time elements
l <- strsplit(x, ":")
# pad vector with leading zeros. Here 4 is the maximum number of time elements
m <- sapply(l, function(x) as.numeric(c(rep(0, 4 - length(x)), x)))
# convert result to desired unit, e.g. seconds
m[1 , ] * 24*60*60 + m[2 , ] * 60*60 + m[3 , ] * 60 + m[4 , ]
# [1] 28.6575 74.0920 3938.1230 518378.7211