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>Server Configuration</TITLE
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>Server Configuration</TITLE
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>eCos Reference Manual</TH
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>eCos Reference Manual</TH
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>Chapter 48. Embedded HTTP Server</TD
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>Chapter 48. Embedded HTTP Server</TD
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><TD
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WIDTH="10%"
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WIDTH="10%"
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ALIGN="right"
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><H1
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><A
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><A
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NAME="NET-HTTPD-CONFIGURATION">Server Configuration</H1
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NAME="NET-HTTPD-CONFIGURATION">Server Configuration</H1
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><P
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><P
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>The HTTP server has a number of configuration options:</P
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>The HTTP server has a number of configuration options:</P
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><DIV
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><DIV
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><H2
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><H2
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CLASS="SECT2"
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CLASS="SECT2"
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><A
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><A
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NAME="AEN15263"><TT
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NAME="AEN15263"><TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGNUM_HTTPD_SERVER_PORT</TT
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>CYGNUM_HTTPD_SERVER_PORT</TT
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></H2
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></H2
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><P
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><P
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>This option defines the TCP port that the server will listen on. It
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>This option defines the TCP port that the server will listen on. It
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defaults to the standard HTTP port number 80. It may be changed to a
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defaults to the standard HTTP port number 80. It may be changed to a
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different number if, for example, another HTTP server is using the
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different number if, for example, another HTTP server is using the
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main HTTP port.</P
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main HTTP port.</P
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><H2
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><H2
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><A
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><A
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NAME="AEN15267"><TT
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NAME="AEN15267"><TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGDAT_HTTPD_SERVER_ID</TT
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>CYGDAT_HTTPD_SERVER_ID</TT
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></H2
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></H2
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><P
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><P
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>This is the string that is reported to the client in the
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>This is the string that is reported to the client in the
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"Server:" field of the HTTP header. </P
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"Server:" field of the HTTP header. </P
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></DIV
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></DIV
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><DIV
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><DIV
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CLASS="SECT2"
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CLASS="SECT2"
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><H2
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><H2
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CLASS="SECT2"
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CLASS="SECT2"
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><A
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><A
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NAME="AEN15271"><TT
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NAME="AEN15271"><TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGNUM_HTTPD_THREAD_COUNT</TT
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>CYGNUM_HTTPD_THREAD_COUNT</TT
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></H2
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></H2
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><P
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><P
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>The HTTP server can be configured to use more than one thread to
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>The HTTP server can be configured to use more than one thread to
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service HTTP requests. If you expect to serve complex pages with many
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service HTTP requests. If you expect to serve complex pages with many
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images or other components that are fetched separately, or if any
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images or other components that are fetched separately, or if any
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pages may take a long time to send, then it may be useful to increase
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pages may take a long time to send, then it may be useful to increase
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the number of server threads. For most uses, however, the connection
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the number of server threads. For most uses, however, the connection
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queuing in the TCP/IP stack and the speed with which each page is
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queuing in the TCP/IP stack and the speed with which each page is
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generated, means that a single thread is usually adequate.</P
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generated, means that a single thread is usually adequate.</P
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></DIV
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></DIV
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><DIV
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><DIV
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CLASS="SECT2"
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CLASS="SECT2"
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><H2
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><H2
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CLASS="SECT2"
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CLASS="SECT2"
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><A
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><A
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NAME="AEN15275"><TT
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NAME="AEN15275"><TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGNUM_HTTPD_THREAD_PRIORITY</TT
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>CYGNUM_HTTPD_THREAD_PRIORITY</TT
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></H2
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></H2
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><P
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><P
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>The HTTP server threads can be run at any priority. The exact priority
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>The HTTP server threads can be run at any priority. The exact priority
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depends on the importance of the server relative to the rest of the
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depends on the importance of the server relative to the rest of the
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system. The default is to put them in the middle of the priority range
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system. The default is to put them in the middle of the priority range
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to provide reasonable response without impacting genuine high priority
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to provide reasonable response without impacting genuine high priority
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threads.</P
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threads.</P
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></DIV
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><H2
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><H2
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CLASS="SECT2"
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><A
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><A
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NAME="AEN15279"><TT
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NAME="AEN15279"><TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGNUM_HTTPD_THREAD_STACK_SIZE</TT
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>CYGNUM_HTTPD_THREAD_STACK_SIZE</TT
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></H2
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></H2
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><P
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><P
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>This is the amount of stack to be allocated for each of the HTTPD
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>This is the amount of stack to be allocated for each of the HTTPD
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threads. The actual stack size allocated will be this value plus the
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threads. The actual stack size allocated will be this value plus the
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values of <TT
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values of <TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGNUM_HAL_STACK_SIZE_MINIMUM</TT
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>CYGNUM_HAL_STACK_SIZE_MINIMUM</TT
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> and
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> and
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<TT
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<TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGNUM_HTTPD_SERVER_BUFFER_SIZE</TT
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>CYGNUM_HTTPD_SERVER_BUFFER_SIZE</TT
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>.</P
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>.</P
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></DIV
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></DIV
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><DIV
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><DIV
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CLASS="SECT2"
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CLASS="SECT2"
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><H2
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><H2
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CLASS="SECT2"
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CLASS="SECT2"
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><A
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><A
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NAME="AEN15285"><TT
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NAME="AEN15285"><TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGNUM_HTTPD_SERVER_BUFFER_SIZE</TT
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>CYGNUM_HTTPD_SERVER_BUFFER_SIZE</TT
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></H2
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></H2
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><P
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><P
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>This defines the size of the buffer used to receive the first line of
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>This defines the size of the buffer used to receive the first line of
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each HTTP request. If you expect to use particularly long URLs or have
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each HTTP request. If you expect to use particularly long URLs or have
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very complex forms, this should be increased.</P
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very complex forms, this should be increased.</P
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></DIV
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CLASS="SECT2"
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CLASS="SECT2"
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><H2
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><H2
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CLASS="SECT2"
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CLASS="SECT2"
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><A
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><A
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NAME="AEN15289"><TT
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NAME="AEN15289"><TT
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CLASS="LITERAL"
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CLASS="LITERAL"
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>CYGNUM_HTTPD_SERVER_DELAY</TT
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>CYGNUM_HTTPD_SERVER_DELAY</TT
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></H2
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></H2
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><P
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><P
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>This defines the number of system clock ticks that the HTTP server
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>This defines the number of system clock ticks that the HTTP server
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will wait before initializing itself and spawning any extra server
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will wait before initializing itself and spawning any extra server
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threads. This is to give the application a chance to initialize
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threads. This is to give the application a chance to initialize
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properly without any interference from the HTTPD.</P
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properly without any interference from the HTTPD.</P
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