Long running requests

A computer-readable medium having computer-executable instructions for processing long-running requests, the instructions comprising:

• sending a first page request to a server;
• wherein a first page includes at least one control;
• rendering the first page in response to a result received in response to the first request;
• sending a second page request;
• wherein the second page request is a long-running request that requests the control to be rendered;
• and
• displaying a progress UI within the control until the long-running request is completed;
• wherein the progress UI is displayed using HTML and wherein the first page is maintained while the long-running request is being processed.

A system for processing long-running requests, comprising:

• a server comprising:
• a processor and a computer-readable medium;
• an operating environment stored on the computer-readable medium and executing on the processor;
• and
• a program operating under the control of the operating environment and operative to perform actions, including:
• receiving a first page request from a client that includes a control within an HTML page associated with the first page request;
• sending HTML in response to the first page request;
• receiving a second page request from the control;
• wherein the second page request is a long-running request;
• performing operations relating to the long-running request;
• streaming data to the client at a rate that avoids a timeout from being detected;
• and
• providing a result of the calculation to the client;
• the client that is coupled to the server, comprising:
• a processor and a computer-readable medium;
• an operating environment stored on the computer-readable medium and executing on the processor;
• a display;
• and
• a browser operating under the control of the operating environment and operative to perform actions, including:
• sending the first page request to the server;
• rendering a first page in response to the received HTML;
• sending the second page request;
• and
• displaying a progress UI within the control until the long-running request is completed while maintaining a state of the first page;
• wherein the progress UI is displayed using HTML.