| Package | Description | 
|---|---|
| org.apache.hc.core5.http.impl.nio | Default implementation of HTTP/1.1 transport based on
 the asynchronous (non-blocking) I/O model. | 
| org.apache.hc.core5.http.message | Core HTTP message components, message element parser
 and writer APIs and their default implementations. | 
| org.apache.hc.core5.http.support | 
| Class and Description | 
|---|
| LineFormatter Interface for formatting elements of the HEAD section of an HTTP message. | 
| LineParser Interface for parsing lines in the HEAD section of an HTTP message. | 
| Class and Description | 
|---|
| AbstractMessageWrapper Abstract  HttpMessagewrapper. | 
| BasicHeaderValueFormatter Default  HeaderValueFormatterimplementation. | 
| BasicHeaderValueParser Default  HeaderValueParserimplementation. | 
| BasicHttpRequest Basic implementation of  HttpRequest. | 
| BasicHttpResponse Basic implementation of  HttpResponse. | 
| BasicLineFormatter Default  LineFormatterimplementation. | 
| BasicLineParser Default  LineParserimplementation. | 
| BufferedHeader This class represents a raw HTTP header whose content is parsed 'on demand'
 only when the header value needs to be consumed. | 
| HeaderGroup A class for combining a set of headers. | 
| HeaderValueFormatter Interface for formatting elements of a header value. | 
| HeaderValueParser Interface for parsing header values into elements. | 
| LazyLaxLineParser Extension of  BasicLineParserthat defers parsing of
 header values. | 
| LazyLineParser Extension of  BasicLineParserthat defers parsing of
 header values. | 
| LineFormatter Interface for formatting elements of the HEAD section of an HTTP message. | 
| LineParser Interface for parsing lines in the HEAD section of an HTTP message. | 
| ParserCursor This class represents a context of a parsing operation:
 
  the current position the parsing operation is expected to start at
  the bounds limiting the scope of the parsing operation
  | 
| RequestLine HTTP/1.1 request line. | 
| StatusLine HTTP/1.1 status line. | 
| StatusLine.StatusClass Standard classes of HTTP status codes, plus  OTHERfor non-standard codes. | 
| TokenParser Deprecated. 
 Use  Tokenizer | 
| Class and Description | 
|---|
| BasicHttpRequest Basic implementation of  HttpRequest. | 
| BasicHttpResponse Basic implementation of  HttpResponse. | 
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