相关配置为公司内环境配置，综合网关用squid模拟。

项目基本架构为：移动综合网关作为ICAP Client，ICAP Server用的是C-ICAP SERVER 0.2.5，往后为公司的业务系统，ICAP Server作用是在移动网关与业务系统之间作适配。

1、squid

squid支持ICAP Client，本次配置如下：

--------------------------------------------------------------------squid.conf--------------------------------------------------------------------

#Icap client for squid
icap_enable on
icap_preview_enable on
icap_preview_size 1024
icap_206_enable off
icap_send_client_ip on
#将HTTP回复发送给icap服务器
icap_service service_res respmod_precache 1 icap://192.168.0.246:1344/ToolbarInsertion
#将HTTP请求发送给icap服务器
icap_service service_req reqmod_precache 0 icap://192.168.0.246:2344/ex206
adaptation_access service_res allow all
adaptation_access service_req allow all

--------------------------------------------------------------------end--------------------------------------------------------------------
ToolbarInsertion：RESPMOD请求URI；

ex206：REQMOD请求URI；

2、icap

icap支持OPTIONS、REQMOD、RESPMOD（参考RFC3507）；

ToolbarInsertion配置文件：srv_xxxxxxx.conf

--------------------------------------------------------------------srv_xxxxxxx.conf--------------------------------------------------------------------

#
# To enable srv_xxxxxxx service in c-icap, copy this file in c-icap
# configuration directory and add the following line at the end of
# c-icap.conf file:
#       Include srv_xxxxxxx.conf
#

# Module: srv_xxxxxxx
#

# Load the srv_xxxxxxx service:
Service wkcash_module srv_xxxxxxx.so

# Add the alias wkwsc for srv_xxxxxxx service. It is used by many
ServiceAlias ToolbarInsertion srv_xxxxxxx

# wk cash module settings

# TAG: srv_xxxxxxx.EmbedHtmlContentTypes
# Format: srv_xxxxxxx.EmbedHtmlContentTypes type1 [type2] ...
# Description:
#    the list of Content types or groups of Content types which will be
#    Embed. For supported types look in c-icap.magic
#    configuration file.
# Default:
#    text/html application/vnd.wap.xhtml+xml application/xhtml+xml.
srv_xxxxxxx.EmbedHtmlContentTypes text/html application/vnd.wap.xhtml+xml application/xhtml+xml

# TAG: srv_xxxxxxx.EmbedWmlContentTypes
# Format: srv_xxxxxxx.EmbedWmlContentTypes type1 [type2] ...
# Description:
#    the list of Content types or groups of Content types which will be
#    Embed. For supported types look in c-icap.magic
#    configuration file.
# Default:
#    text/vnd.wap.wml
srv_xxxxxxx.EmbedWmlContentTypes text/vnd.wap.wml

# TAG: srv_xxxxxxx.CashMereServer
# Format: srv_xxxxxxx.CashMereServer Host Port
# Description:
#   The CashMere Server Host Information
# Default:
#    localhost 18080
srv_xxxxxxx.CashMereServer 192.168.0.246 8090
#srv_xxxxxxx.CashMereServer 192.168.0.246 80
#srv_xxxxxxx.CashMereServer 192.168.0.45 80

# TAG: srv_xxxxxxx.LocalMemCacheServer
# Format: srv_xxxxxxx.LocalMemCacheServer onoff
# Description:
#   Set To Enable or Disable The Local Memcache Server
# Default:
#    off
srv_xxxxxxx.LocalMemCacheServer off

# TAG: srv_xxxxxxx.MemCacheServer
# Format: srv_xxxxxxx.MemCacheServer Host Port
# Description:
#   The Memcache Server Host Information
# Default:
#    localhost 11211
srv_xxxxxxx.MemCacheServer localhost 11212
#srv_xxxxxxx.MemCacheServer 192.168.0.45 11212

# TAG: srv_xxxxxxx.MemCacheExpireTime
# Format: srv_xxxxxxx.MemCacheExpireTime seconds
# Description:
#   Set To Memcache Server ExpireTime
# Default:
#    off
srv_xxxxxxx.MemCacheExpireTime 60

# TAG: srv_xxxxxxx.AccessLogPath
# Format: srv_xxxxxxx.AccessLogPath path
# Description:
#   The Access Log Path Information
# Default:
#    c-icap default log path
srv_xxxxxxx.AccessLogPath /home/src/c_icap-0.2.5_req_mod/var/log

srv_xxxxxxx.ServerGroup 1

# End module: srv_xxxxxxx
--------------------------------------------------------------------end--------------------------------------------------------------------
       C-ICAP Server安装后配置文件在：etc/c-icap.conf

--------------------------------------------------------------------c-icap.conf--------------------------------------------------------------------

#
# This file contains the default settings for c-icap
#
#

# TAG: PidFile
# Format: PidFile pid_file
# Description:
#    The file to store the pid of the main process of the c-icap server.
# Default:
#    PidFile /var/run/c-icap/c-icap.pid
PidFile /var/run/c-icap/c-icap-req.pid

# TAG: CommandsSocket
# Format: CommandsSocket socket_file
# Description:
#    The path of file to use as control socket for c-icap
# Default:
#    CommandsSocket /var/run/c-icap/c-icap.ctl
CommandsSocket /var/run/c-icap/c-icap-req.ctl

# TAG: Timeout
# Format: Timeout seconds
# Description:
#    The time in seconds after which a connection without activity
#    can be cancelled.
# Default:
#    Timeout 300
Timeout 300

# TAG: MaxKeepAliveRequests
# Format: MaxKeepAliveRequests number
# Description:
#    The maximum number of requests can be served by one connection
#    Set it to -1 for no limit
# Default:
#    MaxKeepAliveRequests 100
MaxKeepAliveRequests 100

# TAG: KeepAliveTimeout
# Format: KeepAliveTimeout seconds
# Description:
#    The maximum time in seconds waiting for a new requests before a
#    connection will be closed.
#    If the value is set to -1, there is no timeout.
# Default:
#    KeepAliveTimeout 600
KeepAliveTimeout 600

# TAG: StartServers
# Format: StartServers number
# Description:
#    The initial number of server processes. Each server process
#    generates a number of threads, which serve the requests.
# Default:
#    StartServers 3
StartServers 3

# TAG: MaxServers
# Format: MaxServers number
# Description:
#    The maximum allowed number of server processes.
# Default:
#    MaxServers 10
MaxServers 10

# TAG: MinSpareThreads
# Format: MinSpareThreads number
# Description:
#    If the number of the available threads is less than number,
#    the c-icap server starts a new child.
# Default:
#    MinSpareThreads     10
MinSpareThreads     10

# TAG: MaxSpareThreads
# Format: MaxSpareThreads number
# Description:
#    If the number of the available threads is more than number then
#    the c-icap server kills a child.
# Default:
#    MaxSpareThreads     20
MaxSpareThreads     20

# TAG: ThreadsPerChild
# Format:  ThreadsPerChild number
# Description:
#    The number of threads per child process.
# Default:
#    ThreadsPerChild     10
ThreadsPerChild     10

# TAG: MaxRequestsPerChild
# Format: MaxRequestsPerChild number
# Description:
#    The maximum number of requests that a child process can serve.
#    After this number has been reached, process dies. The goal of this
#    parameter is to minimize the risk of memory leaks and increase the
#    stability of c-icap. It can be disabled by setting its value to 0.
# Default:
#    MaxRequestsPerChild  0
MaxRequestsPerChild  0

# TAG: Port
# Format: Port port
# Description:
#    The port number that the c-icap server uses to listen to requests.
# Default:
#    Port 1344
Port 1344

# TAG: User
# Format: User username
# Description:
#    The user owning c-icap's processes. By default, the owner is the
#    user who runs the program.
# Default:
#    No value
# Example:
#    User wwwrun

# TAG: Group
# Format: Group groupname
# Description:
#    The group of users owning c-icap's processes, which, by default
#    is the group of the current user.
# Default:
#    No value
# Example:
#    Group nogroup

# TAG: ServerAdmin
# Format: ServerAdmin admin_mail
# Description:
#    The Administrator of this server. Used when displaying information
#    about this server (logs, info service, etc)
# Default:
#    No value
ServerAdmin you@your.address

# TAG: ServerName
# Format: ServerName aServerName
# Description:
#    A name for this server. Used when displaying information about this
#    server (logs, info service, etc)
# Default:
#    No value
ServerName YourServerName

# TAG: TmpDir
# Format: TmpDir dir
# Description:
#    dir is the location of temporary files.
# Default:
#    TmpDir /var/tmp
TmpDir /var/tmp

# TAG: MaxMemObject
# Format: MaxMemObject bytes
# Description:
#    The maximum memory size in bytes taken by an object which
#    is processed by c-icap . If the size of an object's body is
#    larger than the maximum size a temporary file is used.
# Default:
#    MaxMemObject 131072
MaxMemObject 131072

# TAG: DebugLevel
# Format: DebugLevel level
# Description:
#    The level of debugging information to be logged.
#    The acceptable range of levels is between 0 and 10.
# Default:
#    DebugLevel 1
DebugLevel 1

# TAG: ModulesDir
# Format: ModulesDir dir
# Description:
#    The location of modules
# Default:
#    ModulesDir /home/src/c_icap-0.2.5/lib/c_icap
ModulesDir /home/src/c_icap-0.2.5_req_mod/lib/c_icap

# TAG: ServicesDir
# Format: ServicesDir dir
# Description:
#    The location of services
# Default:
#    ServicesDir /home/src/c_icap-0.2.5/lib/c_icap
ServicesDir /home/src/c_icap-0.2.5_req_mod/lib/c_icap

# TAG: TemplateDir
# Format: TemplateDir dir
# Description:
#    The location of the text templates used by c-icap and its services,
#    categorized by language and services/modules
# Default:
#    No value
# Example:
TemplateDir /home/src/c_icap-0.2.5_req_mod/share/c_icap/templates/

# TAG: TemplateDefaultLanguage
# Format: TemplateDefaultLanguage lang
# Description:
#    Sets the default language to use for text templates
# Default:
#    TemplateDefaultLanguage en
TemplateDefaultLanguage en

#TemplateReloadTime 360
#TemplateCacheSize 20
#TemplateMemBufSize 8192

# TAG: LoadMagicFile
# Format: LoadMagicFile path
# Description:
#    Load a c-icap magic file. A magic file contains various
#    data type definitions. Look inside default c-icap.magic file
#    for more informations.
#    It can be used more than once to use multiple magic files.
# Default:
#    LoadMagicFile /home/src/c_icap-0.2.5/etc/c-icap.magic
LoadMagicFile /home/src/c_icap-0.2.5_req_mod/etc/c-icap.magic

# TAG: RemoteProxyUsers
# Format: RemoteProxyUsers onoff
# Description:
#    Set it to on if you want to use username provided by the proxy server.
#    This is the recomended way to use users in c-icap.
#    If the RemoteProxyUsers is off and c-icap configured to use users or
#    groups the internal authentication mechanism will be used.
# Default:
#    RemoteProxyUsers off
RemoteProxyUsers off

# TAG: RemoteProxyUserHeader
# Format: RemoteProxyUserHeader Header
# Description:
#    Used to specify the icap header used by the proxy server to send
#    the authenticated client username to c-icap server
# Default:
#    RemoteProxyUserHeader X-Authenticated-User
RemoteProxyUserHeader X-Authenticated-User

# TAG: RemoteProxyUserHeaderEncoded
# Format: RemoteProxyUserHeaderEncoded onoff
# Description:
#    Set it to off if the RemoteProxyUserHeader is not base64 encoded
# Default:
#    RemoteProxyUserHeaderEncoded on
RemoteProxyUserHeaderEncoded on

# TAG: AuthMethod
# Format: AuthMethod Method Authenticator
# Description:
#    Used to define the internal authentication mechanism to use. This
#    feature is not well tested and may cause problems. It is better to use
#    RemoteProxyUser configuration.
#    Method is the authentication method to use (basic, digest, etc).
#    Currently only basic authentication method is implemented as build in
#    module
#    Authenticator currently can only be "basic_simple_db"
#    It can be considered as a user/password store and can be
#    implemented as external module. The basic_simple_db is implemented as
#    build it module
# Default:
#    No set
# Example:
#    AuthMethod basic basic_simple_db

# TAG: basic.Realm
# Format: basic.Realm ARealm
# Description:
#    Specify the basic method realm
# Default:
#    basic.Realm "Basic authentication"
# Example:
#    basic.Realm "c-icap server authentication"

# TAG: basic_simple_db.UsersDB
# Format: basic_simple_db.UsersDB LookupTable
# Description:
#    Specify the lookup table where the usernames/passwords pairs
#    are stored. The paswords must be unencrypted
#    For more information about c-icap lookup tables read c-icap server
#    manual page
# Default:
#    No value
# Example:
#    basic_simple_db.UsersDB hash:/usr/local/c-icap/etc/c-icap-users.txt

# TAG: GroupSourceByGroup
# Format: GroupSourceByGroup LookupTable
# Description:
#    Defines a lookup table where the groups of users are stored indexed
#    by group. It can be used more than once.
#    For more information about c-icap lookup tables read c-icap server
#    manual page
# Default:
#    No set
# Example:
#    GroupSourceByGroup hash:/usr/local/c-icap/etc/c-icap-groups.txt

# TAG: GroupSourceByUser
# Format: GroupSourceByUser LookupTable
# Description:
#    Defines a lookup table where the groups of users are stored indexed
#    by user. It can be used more than once.
#    For more information about c-icap lookup tables read c-icap server
#    manual page
# Default:
#    No set
# Example:
#    GroupSourceByUser hash:/usr/local/c-icap/etc/c-icap-user-groups.txt

# TAG: acl
# Format: acl name type[{param}] value1 [value2] [...]
# Description:
#    Supported acl types are:
#        acl aclname service service1 ...
#             The servicename
#        acl aclname type OPTIONS|RESPMOD|REQMOD ...
#             The icap method
#        acl aclname port port1 ...
#             The icap server port
#        acl aclname src ip1/netmask1 ...
#             The client ip address
#        acl aclname srvip ip1/netmask1 ...
#             The c-icap server ip address
#        acl aclname icap_header{HeaderName} value1 ...
#             Matches the icap header HeaderName with value1 ...
#             The values are in regex form: /avalue/
#        acl aclname icap_resp_header{HeaderName} value1 ...
#             The icap response header
#             The values are in regex form: /avalue/
#        acl aclname http_req_header{HeaderName} value1 ...
#             The http request header
#             The values are in regex form: /avalue/
#        acl aclname http_resp_header{HeaderName} value1 ...
#             The http response header
#             The values are in regex form: /avalue/
#        acl aclname data_type type1 ...
#             The data type as recognized by the internal data type
#             recognizer. The types are defined in c-icap.magic file
#        acl aclname auth username|* ...
#             The authenticated users. Using * instead of username means
#             all users.
#        acl aclname group group1 ...
#             if the user of request belongs to given groups
# Default:
#    None set
# Examples:
#    acl OPTIONS type OPTIONS
#    acl RESPMOD type RESPMOD
#    acl REQMOD  type REQMOD
#    acl ALLREQUESTS type OPTIONS RESPMOD REQMOD
#    acl XHEAD icap_header{X-Test}  /value/
#    acl ECHO service echo
#    acl localnet src 192.168.1.0/255.255.255.0
#    acl localhost src 127.0.0.1/255.255.255.255
#    acl all src 0.0.0.0/0.0.0.0

# TAG: icap_access
# Format: icap_access allow|deny [!]acl1 ...
# Description:
#    Allowing or denying ICAP access based on defined access lists
# Default:
#    None set
# Example:
#    icap_access deny XHEAD
#    #Allow OPTIONS method for all:
#    icap_access allow localnet OPTIONS
#    #Require authentication for all users from local network:
#    icap_access allow AUTH localnet
#    icap_access deny all

# TAG: client_access
# Format: client_access allow|deny acl1 [acl2] [...]
# Description:
#    Allowing or denying connections on c-icap based on
#    defined access lists. Only the acl types src, srvip and port
#    can be used.
# Default:
#    None set
# Example:
#    client_access allow all

# TAG: LogFormat
# Format: LogFormat Name Format
# Description:
#    Name is a name for this log format.
#    Format is a string with embedded % format codes. % format codes
#    has the following form:
#        % [-] [width] [{argument}] formatcode
#        if - is specified then the output is left aligned
#        if width specified then the field is exactly width size
#        some formatcodes support arguments given as {argument}
#    
#    Format codes:
#           %a:  Remote IP-Address
#           %la: Local IP Address
#           %lp: Local port
#           %>a: Http Client IP Address. Only supported if the proxy
#                   client supports the "X-Client-IP" header
#           %<A: Http Server IP Address. Only supported if the proxy
#                   client supports the "X-Server-IP" header
#           %ts: Seconds since epoch
#           %tl: Local time. Supports optional strftime format argument
#           %tg: GMT time. Supports optional strftime format argument
#           %>ho: Modified Http request header. Supports header name
#                    as argument. If no argument given the first line returned
#           %huo: Modified Http request url
#           %<ho: Modified Http reply header. Supports header name
#                    as argument. If no argument given the first line returned
#           %iu: Icap request url
#           %im: Icap method
#           %is: Icap status code
#           %>ih: Icap request header. Supports header name
#                    as argument. If no argument given the first line returned
#           %<ih: Icap response header. Supports header name
#                    as argument. If no argument given the first line returned
#           %Ih: Http bytes received
#           %Oh: Http bytes sent
#           %Ib: Http body bytes received
#           %Ob: Http body bytes sent
#           %I: Bytes received
#           %O: Bytes sent
#           %bph: The first 5 bytes of the body preview data. Non
#                    printable characters printed in hex form.
#                    Supports the number of bytes to output as argument.
#           %un: Username
#           %Sl: Service log string
#              %Sa: Attribute value set by service. The attribute name must
#                   given as argument.
# Default:
#    None set
# Example:
#    LogFormat myFormat "%tl, %a %im %iu %is %I %O %Ib %Ob %{10}bph"

# TAG: ServerLog
# Format: ServerLog LogFile
# Description:
#    the file used by the build-in logger file_logger to
#    store debugging information, errors and other
#    information about the c-icap server.
# Default:
#    ServerLog /home/src/c_icap-0.2.5/var/log/server.log
ServerLog /home/src/c_icap-0.2.5_req_mod/var/log/server.log

# TAG: AccessLog
# Format: AccessLog LogFile [LogFormat] [[!]acl1] [[!]acl2] [...]
# Description:
#    LogFile is a file where to log access information.
#    LogFormat is the log format to use. If ommited c-icap uses:
#         "%tl, %la %a %im %iu %is"
#    Also acls can be used to select certain requests to be logged.
#    This directive can be used more than once to specify more than
#    one access log files
# Default:
#    AccessLog /home/src/c_icap-0.2.5/var/log/access.log
# Example:
#    AccessLog /home/src/c_icap-0.2.5/var/log/access.log MyFormat all
AccessLog /home/src/c_icap-0.2.5_req_mod/var/log/access.log

# TAG: Logger
# Format: Logger LoggerName
# Description:
#    Specify wich logger to use. By default uses the build in "file_logger" which
#    uses files for access and server logging.
# Default:
#    Logger file_logger
# Example:
#    Logger sys_logger

# TAG: Module
# Format: Module Type ModuleFile
# Description:
#    Load an external module/plugin to c-icap.
#    ModuleFile is the filename of the module. If no full path given then c-icap
#    searche in path defined by the ModulesDir configuration parameter.
#    Type is the type of the external module and can be one of the following:
#    - "logger" for modules implement a logger
#    - "common" for general purpose modules
# Default:
#    
# Example:
#    Module logger sys_logger.so

# TAG: Service
# Format: Service aName ServiceFile
# Description:
#    It loads the service ServiceFile. The argument aName used
#    as alias name for the service
# Default:
#    
# Example:
#    Service echo_service srv_echo.so

# TAG: ServiceAlias
# Format: ServiceAlias AliasName ServiceName[?param1=value1&param2=value2...]
# Description:
#    Used to define an alias name for a service.
# Default:
#    
# Example:
#    ServiceAlias avscan srv_clamav?allow204=on&sizelimit=off&mode=simple

#
# TAG: General configuration parameters for all services
# Description:
#    PreviewSize: The preview data size to advertise to the icap client
#    MaxConnections: The client should not use more than MaxConnections
#        for this service.
#    TransferPreview: The list of file extensions, seperated by commas,
#        for which the client should send preview data.
#    TransferIgnore: The list of file extensions that should not be sent
#        to the icap server
#    TransferComplete: The list of file extensions that should be sent
#        in their entirety, without preview, to the icap server
#    OptionsTTL: The options ttl for the service. The "sec[s]", "min" or
#        "hour[s]" can be used to secify that the time is in seconds
#        minutes or hours respectively. If no time-units given
#        seconds are assumed.
#    Allow206 on|off: Enable/disable advertise of 206 responses.
#
# Example:
#    echo.PreviewSize 512
#    echo.TransferIgnore gif, jpeg
#    echo.OptionsTTL 3 min

######################################################
# External modules comming with core c-icap server
#
# Module: echo
# Description:
#    Simple test service
# Example:
#    Service echo srv_echo.so
Service echo srv_echo.so

######此处是将services库添加进来，其他地方大部分不用改，部分路径依实际情况更改
Service ex206 srv_ex206.so

# Module: sys_logger
# Description:
#    Add support for logging access and server events to syslog server
#    Use "Module" configuration parameter to load this module and "Logger"
#    to make it default logger for the c-icap.
# Example:
#    Module logger sys_logger.so
#    Logger sys_logger

# TAG: sys_logger.Prefix
# Format: sys_logger.Prefix string
# Description:
#     string is be presented in every syslog message.
# Default:
#    sys_logger.Prefix "C-ICAP:"

# TAG: sys_logger.Facility
# Format: sys_logger.Facility daemon|user|local1|local2|local3|local4|local5|local6|local7
# Description:
#    specifies the facility type of syslog.
# Default:
#    sys_logger.Facility daemon

# TAG: sys_logger.access_priority
# Format: sys_logger.access_priority alert|crit|debug|emerg|err|info|notice|warning
# Description:
#    determines  the  importance  of the access log message
# Default:
#    sys_logger.access_priority info

# TAG: sys_logger.server_priority
# Format: sys_logger.server_priority alert|crit|debug|emerg|err|info|notice|warning
# Description:
#    determines  the  importance  of the server log message
# Default:
#    sys_logger.server_priority crit

# TAG: sys_logger.LogFormat
# Format: sys_logger.LogFormat LOGFORMAT
# Description:
#    The log format to use. If no log format defined then
#    the following will be used:
#        "%la %a %im %iu %is"
# Default:
#    None set
# Example:
#    Logformat BasicFormat "%la %a %im %iu %is"
#    sys_logger.LogFormat BasicFormat

# TAG: sys_logger.access
# Format: sys_logger.access [!]acl1 ...
# Description:
#    Allow selecting ICAP requests to be logged using acls.
#    By default all requests will be logged.
# Default:
#    None set
# Example:
#    sys_logger.access all

# End module: sys_logger

# Module: bdb_tables
# Description:
#    Add support for Berkeley DB based lookup tables. The format for
#    bdb path of the lookup table is:
#        bdb:/path/to/bdb
#    Use the c-icap-mkbdb utility to build Berkeley DB c-icap lookup tables
# Example:
#    Module common bdb_tables.so

# End module: bdb_tables

# Module: dnsbl_tables
# Description:
#    Add support for dns lookup tables. Can be used to access
#    dns block lists. The dnsbl lookup table path definition is:
#        dnsbl:domainname
#    For example the lookup table  for accessing the black.uribl.com
#    dns black list is:
#        dnsbl:black.uribl.com
# Example:
#    Module common dnsbl_tables.so

# End module: dnsbl_tables

# Module: ldap_module
# Description:
#    Add LDAP support to c-icap. The user can use LDAP based lookup tables
#    using the following lookup table path:
#          ldap://[username:password@]ldapserver?base?attr1,attr2?filter[{[cache=no]}]
#    The filter can contain the "%s" formating code which will be replaced by
#    the search key
#    Examples of supported ldap urls:
#         ldap://ldap.chtsanti.net?o=chtsanti?cn,uid?uid=%s
#         ldap://cn=Directory Manager:Apassword@ldap.chtsanti.net?o=chtsanti?mermberUid?(&(objectClass=posixGroup)(cn=%s))
#    
#    WARNING: is not enough tested it may contain bugs!
# Example:
#    Module common ldap_module.so

# End module: ldap_module

####包含services库
Include srv_xxxxxxx.conf
--------------------------------------------------------------------end--------------------------------------------------------------------
更改后将各自进程重启，生效。