Setting the Response from a String

HydraExpress Components : Servlet Development Guide : PART III Programming : Creating Responses : Creating an HTTP Response : Setting the Response from a String

An rwsf::ServletResponse also provides a setPayload() function. The function sets the body of the response directly, from a single std::string. Setting the payload directly is generally more efficient than using the rwsf::ServletOutputStream class to write the response. The doGet() function below constructs a std::string, then uses the setPayload() function to create the response.

void myServlet::doGet (rwsf::HttpServletRequest& request,

rwsf::HttpServletResponse& response)

{

response.setContentType("text/html"); // 1

std::string output("<html>\n"

"<head><title>Simple Response</title></head>\n"

"<body bgcolor=\"white\">\n"

"<h1>Simple Response</h1>\n"

"A simple HTML response.\n"

"</body></html>\n"); // 2

response.setPayload(output); // 3

}

//1 Sets the Content-Type of the response to text/html. A client may use the Content-Type to determine the kind of document in the response. Without this line, some clients interpret the response as plain text rather than HTML.

//2 Creates an string containing the response.

//3 Sets the content of the response to output. In this version, the servlet sets the entire response in a single operation.

The related function appendPayload() appends a string to the current contents of the response.