after-handler
 ...
 end-after-handler

 after-handler
      @Hi there!!
 end-after-handler

 run-query @mydb = ...

 //or

 begin-transaction @sales_db

 begin-handler /status public
     silent-header
     get-param server
     get-param days

     pf-out "/server/remote-status/days=%s", days to payload
     pf-out "%s:3800", server to srv_location

     new-remote srv location srv_location \
         method "GET" url-path payload \
         timeout 30

     call-remote srv
     read-remote srv data dt
     @Output is: [<<p-out dt>>]
 end-handler

 begin-handler /remote-status public
     silent-header
     get-param days

     pf-out "Status in the past %s days is okay", days
 end-handler

 begin-handler /encrypt public
     set-string str = "This contains a secret code, which is Open Sesame!"
     // Encrypt
     encrypt-data str to enc_str password "my_password"
     p-out enc_str
     @
     // Decrypt
     decrypt-data enc_str password "my_password" to dec_str
     p-out dec_str
     @
 end-handler

 begin-handler /encrypt public
     set-string str = "This contains a secret code, which is Open Sesame!"
     // Encrypt
     encrypt-data str to enc_str password "my_password" binary
     // Save the encrypted data to a file
     write-file "encrypted_data" from enc_str
     get-app directory to app_dir
     @Encrypted data written to file <<p-out app_dir>>/encrypted_data
     // Decrypt data
     decrypt-data enc_str password "my_password" binary to dec_str
     p-out dec_str
     @
 end-handler

 begin-handler /encrypt public
     set-string str = "This c\000ontains a secret code, which is Open Sesame!"
     // Encrypt
     encrypt-data str to enc_str password "my_password" input-length 12
     p-out enc_str
     @
     // Decrypt
     decrypt-data enc_str password "my_password" to dec_str
     // Output binary data; present null byte as octal \000

     string-length dec_str to res_len
     start-loop repeat res_len use i start-with 0
         if-true dec_str[i] equal 0
             p-out "\\000"
         else-if
             pf-out "%c", dec_str[i]
         end-if
     end-loop
     @
 end-handler

 begin-handler /encrypt public
     set-string str = "This contains a secret code, which is Open Sesame!"
     // Encrypt data
     encrypt-data str to enc_str password "my_password" \
         cipher "CAMELLIA-256-CFB1" digest "SHA3-512"
     p-out enc_str
     @
     // Decrypt data
     decrypt-data enc_str password "my_password"  to dec_str \
         cipher "CAMELLIA-256-CFB1" digest "SHA3-512"
     p-out dec_str
     @
 end-handler

 begin-handler /encrypt public
     set-string str = "This contains a secret code, which is Open Sesame!"
     // Get salt
     random-string to rs length 16
     // Encrypt data
     encrypt-data str to enc_str password "my_password" salt rs
     @Salt used is <<p-out rs>>, and the encrypted string is <<p-out enc_str>>
     // Decrypt data
     decrypt-data enc_str password "my_password" salt rs to dec_str
     p-out dec_str
     @
 end-handler

 begin-handler /encrypt public
     // Get salt
     random-string to rs length 16
     // Encrypt data
     start-loop repeat 10 use i start-with 0
         random-string to iv length 16
         encrypt-data "The same message" to enc_str password "my_password" salt rs iterations 2000 init-vector iv cache
         @The encrypted string is <<p-out enc_str>>
         // Decrypt data
         decrypt-data enc_str password "my_password" salt rs iterations 2000 init-vector iv to dec_str cache
         p-out dec_str
         @
     end-loop
 end-handler

 begin-handler /start public
    @<h2>File Manager</h2>
    @To manage the uploaded files, <a href="<<p-path "/list">>">click here.</a><br/>
    @<br/>
    @<form action="<<p-path "/upload">>" method="POST" enctype="multipart/form-data">
    @    <label for="file_description">File description:</label><br>
    @    <textarea name="filedesc" rows="3" columns="50"></textarea><br/>
    @    <br/>
    @    <label for="filename">File:</label>
    @    <input type="file" name="file" value=""><br><br>
    @    <input type="submit" value="Submit">
    @</form>
 end-handler

 begin-handler /list public
     @<h2>List of files</h2>
     @To add a file, <a href="<<p-path "/start">>">click here</a><br/><br/>
     @<table border="1">
     @<tr>
     @    <td>File</td><td>Description</td><td>Size</td><td>Show</td><td>Delete</td>
     @</tr>
     run-query @db= \
         "select fileName, description, fileSize, fileID from files order by fileSize desc" \
         output file_name, description noencode, file_size, file_ID
         @<tr>
         @    <td><<p-web file_name>></td><td><<p-web description>><td><<p-web file_size>></td>
         @    <td><a href="<<p-path "/download">>/file_id=<<p-url file_ID>>">Show</a></td>
         @    <td><a href="<<p-path "/delete">>/action=confirm/file_id=<<p-url file_ID>>">Delete</a></td>
         @</tr>
     end-query
     @</table>
 end-handler

 begin-handler /upload public
    get-param filedesc      // file description from the upload form
    get-param file_filename // file name
    get-param file_location // the path to uploaded file
    get-param file_size     // size in bytes
    get-param file_ext      // the file extension
    @<h2>Uploading file</h2>
    run-query @db= \
         "insert into files (fileName, localPath, extension, description, fileSize) \
             values ('%s', '%s', '%s', '%s', '%s')" \
         input file_filename, file_location, file_ext, filedesc, file_size
    end-query
    @File <<p-web file_filename>> of size <<p-web file_size>> \
         is stored on server at <<p-web file_location>>. \
         File description is <<p-web filedesc>>.<hr/>
 end-handler

 begin-handler /download public
     get-param file_id
     run-query @db= \
         "select localPath,extension from files where fileID='%s'" \
         input file_id \
         output local_path, ext \
         row-count num_files
             if-true ext equal ".jpg"
                 send-file local_path headers content-type "image/jpg"
             else-if ext equal ".pdf"
                 send-file local_path headers content-type "application/pdf"
             else-if
                 send-file local_path headers content-type "application/octet-stream" download
             end-if
     end-query
     if-true num_files not-equal 1
         @Cannot find this file!<hr/>
         exit-handler
     end-if
 end-handler

 begin-handler /delete public
    @<h2>Delete a file</h2>
    get-param action
    get-param file_id
    run-query @db="select fileName, localPath, description  from files where fileID='%s'" output file_name, local_path, desc input file_id
         if-true action equal "confirm" // get file information to confirm what will be deleted
            @Are you sure you want to delete file <<p-web file_name>> (<<p-web desc>>)? Click <a href="<<p-path "/delete">>?action=delete&amp;file_id=<<p-url file_id>>">Delete</a> or click the browser's Back button to go back.<br/>
         else-if action equal "delete"  // actual delete file, once confirmed
            begin-transaction @db
            run-query @db= "delete from files where fileID='%s'" input file_id error err no-loop
            if-true err not-equal "0"
                @Could not delete the file (error <<p-web err>>)
                rollback-transaction @db
            else-if
                delete-file local_path status st
                if-true st equal GG_OKAY
                    commit-transaction @db
                    @File deleted. Go back to <a href="<<p-path "/start">>">start page</a>
                else-if
                    rollback-transaction @db
                    @File could not be deleted, error <<p-num st>>
                end-if
            end-if
         else-if
            @Unrecognized action <<p-web action>>
         end-if
    end-query
 end-handler

 begin-handler /hello-world public
     get-param name
     @This is Hello World from <<p-out name>>
 end-handler

 begin-handler /srv public
     do-once
         new-index ind process-scope
     end-do-once
     get-param op
     get-param key
     get-param data
     if-true op equal "add"
         write-index ind key (key) value data status st
         if-true st equal GG_ERR_EXIST
             @Key exists [<<p-out key>>]
         else-if
             @Added [<<p-out key>>]
         end-if
     else-if op equal "delete"
         delete-index ind key (key) value val status st
         if-true st equal GG_ERR_EXIST
             @Not found [<<p-out key>>]
         else-if
             @Deleted, old value was [<<p-out val>>]
         end-if
     else-if op equal "query"
         read-index ind equal (key) value val status st
         if-true st equal GG_ERR_EXIST
             @Not found, queried [<<p-out key>>]
         else-if
             @Value [<<p-out val>>]
         end-if
     end-if
 end-handler

 %% /add-stock public
     @<html>
         @<body>
         get-param name
         get-param price
         // Add data to stock table, update if the stock exists
         run-query @db_stock = "insert into stock (stock_name, stock_price) values ('%s', '%s') on duplicate key update stock_price='%s'" \
             input name, price, price error err no-loop
         if-true err not-equal "0"
             report-error "Cannot update stock price, error [%s]", err
         end-if
         @<div>
             @Stock price updated!
         @</div>
         @</body>
     @</html>
 %%

 %% /show-stock public
     @<html>
         @<body>
             @<table>
                 @<tr>
                     @<td>Stock name</td>
                     @<td>Stock price</td>
                 @</tr>
                 run-query @db_stock = "select stock_name, stock_price from stock" output stock_name, stock_price
                     @<tr>
                         @<td>
                         p-out stock_name
                         @</td>
                         @<td>
                         p-out  stock_price
                         @</td>
                     @</tr>
                 end-query
             @</table>
         @</body>
     @</html>
 %%

 before-handler
     set-param displayed_logout = false, is_logged_in = false
     call-handler "/session/check"
 end-before-handler

 // Display link to login or signup
 %% /session/login-or-signup private
     @<a href="<<p-path "/session/user/login">>">Login</a> &nbsp; &nbsp; <a href="<<p-path "/session/user/new/form">>">Sign Up</a><hr/>
 %%
 // Login with email and password, and create a new session, then display home pag
 %% /session/login public
     get-param pwd, email
     hash-string pwd to hashed_pwd
     random-string to sess_id length 30
     run-query @db_app = "select userId from users where email='%s' and hashed_pwd='%s'" output sess_user_id : email, hashed_pwd
         run-query @db_app no-loop = "update users set session='%s' where userId='%s'" input sess_id, sess_user_id affected-rows arows
         if-true arows not-equal 1
             @Could not create a session. Please try again. <<call-handler "/session/login-or-signup">> <hr/>
             exit-handler
         end-if
         set-cookie "sess_user_id" = sess_user_id path "/", "sess_id" = sess_id path "/"
         call-handler "/session/check"
         call-handler "/session/show-home"
         exit-handler
     end-query
     @Email or password are not correct. <<call-handler "/session/login-or-signup">><hr/>
 %%
 // Starting point of the application. Either display login form or a home page:
 %% /session/start public
     get-param action, is_logged_in type bool
     if-true is_logged_in equal true
         if-true action not-equal "logout"
             call-handler "/session/show-home"
             exit-handler
         end-if
     end-if
     call-handler "/session/user/login"
 %%
 // Generic home page, you can call anything from here, in this case a list of note
 %% /session/show-home private
     call-handler "/notes/list"
 %%
 // Logout user and display home, which will ask to either login or signup
 %% /session/logout public
     get-param is_logged_in type bool
     if-true is_logged_in equal true
         get-param sess_user_id
         run-query @db_app = "update users set session='' where userId='%s'" input sess_user_id no-loop affected-rows arows
         if-true arows equal 1
             set-param is_logged_in = false
             @You have been logged out.<hr/>
             commit-transaction @db_app
         end-if
     end-if
     call-handler "/session/show-home"
 %%
 // Check session based on session cookie. If session cookie corresponds to the email address, the request is a part of an authorized session
 %% /session/check private
     get-cookie sess_user_id="sess_user_id", sess_id="sess_id"
     set-param sess_id, sess_user_id
     if-true sess_id not-equal ""
         set-param is_logged_in = false
         run-query @db_app = "select email from users where userId='%s' and session='%s'" output email input sess_user_id, sess_id row-count rcount
             set-param is_logged_in = true
             get-param displayed_logout type bool
             if-true displayed_logout equal false
                 get-param action
                 if-true action not-equal "logout"
                     @Hi <<p-out email>>! <a href="<<p-path "/session/logout">>">Logout</a><br/>
                 end-if
                 set-param displayed_logout = true
             end-if
         end-query
         if-true rcount not-equal 1
             set-param is_logged_in = false
         end-if
     end-if
 %%
 // Check that email verification token is the one actually sent to the email address
 %% /session/verify-signup public
     get-param code, email
     run-query @db_app = "select verify_token from users where email='%s'" output db_verify : email
         if-true  code equal db_verify
             @Your email has been verifed. Please <a href="<<p-path "/session/user/login">>">Login</a>.
             run-query @db_app no-loop = "update users set verified=1 where email='%s'" : email
             exit-handler
         end-if
     end-query
     @Could not verify the code. Please try <a href="<<p-path "/session/user/new/verify-form">>">again</a>.
     exit-handler
 %%
 // Display login form that asks for email and password
 %% /session/user/login public
     call-handler "/session/login-or-signup"
     @Please Login:<hr/>
     @<form action="<<p-path "/session/login">>" method="POST">
     @<input name="email" type="text" value="" size="50" maxlength="50" required autofocus placeholder="Email">
     @<input name="pwd" type="password" value="" size="50" maxlength="50" required placeholder="Password">
     @<button type="submit">Go</button>
     @</form>
 %%
 // Display form for a new user, asking for an email and password
 %% /session/user/new/form public
     @Create New User<hr/>
     @<form action="<<p-path "/session/user/new/create">>" method="POST">
     @<input name="email" type="text" value="" size="50" maxlength="50" required autofocus placeholder="Email">
     @<input name="pwd" type="password" value="" size="50" maxlength="50" required placeholder="Password">
     @<input type="submit" value="Sign Up">
     @</form>
 %%
 // Send verification email
 %% /session/user/new/send-verify private
     get-param email, verify
     write-string msg
         @From: service@your-service.com
         @To: <<p-out email>>
         @Subject: verify your account
         @
         @Your verification code is: <<p-out verify>>
     end-write-string
     exec-program "/usr/sbin/sendmail" args "-i", "-t" input msg status st
     if-true st not-equal 0 or true equal false
         @Could not send email to <<p-out email>>, code is <<p-out verify>>
         set-param verify_sent = false
     else-if
         set-param verify_sent = true
     end-if
 %%
 // Create new user from email and password
 %% /session/user/new/create public
     get-param email, pwd
     hash-string pwd to hashed_pwd
     random-string to verify length 5 number
     begin-transaction @db_app
     run-query @db_app no-loop = "insert into users (email, hashed_pwd, verified, verify_token, session) values ('%s', '%s', '0', '%s', '')" input email, hashed_pwd, verify affected-rows arows error err on-error-continue
     if-true err not-equal "0" or arows not-equal 1
         call-handler "/session/login-or-signup"
         @User with this email already exists.
         rollback-transaction @db_app
     else-if
         set-param email, verify
         call-handler "/session/user/new/send-verify"
         get-param verify_sent type bool
         if-true verify_sent equal false
             rollback-transaction @db_app
             exit-handler
         end-if
         commit-transaction @db_app
         call-handler "/session/user/new/verify-form"
     end-if
 %%
 // Display form to enter the code emailed to user to verify the email address
 %% /session/user/new/verify-form public
     get-param email
     @Please check your email and enter verification code here:
     @<form action="<<p-path "/session/verify-signup">>" method="POST">
     @<input name="email" type="hidden" value="<<p-out email>>">
     @<input name="code" type="text" value="" size="50" maxlength="50" required autofocus placeholder="Verification code">
     @<button type="submit">Verify</button>
     @</form>
 %%

 // Delete a note
 %% /notes/delete public
     call-handler "/notes/header"
     get-param sess_user_id, note_id
     run-query @db_app = "delete from notes where noteId='%s' and userId='%s'" : note_id, sess_user_id \
             affected-rows arows no-loop error errnote
     if-true arows equal 1
         @Note deleted
     else-if
         @Could not delete note (<<p-out errnote>>)
     end-if
 %%
 // Display a form to add a note
 %% /notes/form-add  public
     call-handler "/notes/header"
     @Add New Note
     @<form action="<<p-path "/notes/add">>" method="POST">
     @<textarea name="note" rows="5" cols="50" required autofocus placeholder="Enter Note"></textarea>
     @<button type="submit">Create</button>
     @</form>
 %%
 // Add a note
 %% /notes/add public
     call-handler "/notes/header"
     get-param note, sess_user_id
     run-query @db_app = "insert into notes (dateOf, userId, note) values (now(), '%s', '%s')" : sess_user_id, note \
             affected-rows arows no-loop error errnote
     if-true arows equal 1
         @Note added
     else-if
         @Could not add note (<<p-out errnote>>)
     end-if
 %%
 // List all notes
 %% /notes/list public
     call-handler "/notes/header"
     get-param sess_user_id
     run-query @db_app = "select dateOf, note, noteId from notes where userId='%s' order by dateOf desc" \
             input sess_user_id output dateOf, note, noteId
         match-regex "\n" in note replace-with "<br/>\n" result with_breaks status st cache
         if-true st equal 0
             set-string with_breaks = note
         end-if
         @Date: <<p-out dateOf>> (<a href="<<p-path "/notes/ask-delete">>?note_id=<<p-out noteId>>">delete note</a>)<br/>
         @Note: <<p-out with_breaks>><br/>
         @<hr/>
     end-query
 %%
 // Display a question whether to delete a note or not
 %% /notes/ask-delete public
     call-handler "/notes/header"
     get-param note_id
     @Are you sure you want to delete a note? Use Back button to go back,\
        or <a href="<<p-path "/notes/delete">>?note_id=<<p-out note_id>>">delete note now</a>.
 %%
 // Check if session is authorized, and display an appropriate header
 %% /notes/header private
     get-param is_logged_in type bool
     if-true is_logged_in equal false
         call-handler "/session/login-or-signup"
     end-if
     @<h1>Welcome to Notes!</h1><hr/>
     if-true is_logged_in equal false
         exit-handler
     end-if
     @<a href="<<p-path "/notes/form-add">>">Add Note</a> <a href="<<p-path "/notes/list">>">List Notes</a><hr/>
 %%

 begin-handler /local/time
     get-param tzone // get time zone as input parameter (i.e. "EST", "MST", "PST" etc.)
     get-time to curr_time timezone tzone
     @<div>Current time is <<p-out curr_time>></div>
 end-handler

 begin-handler /some/service
     set-param tzone="EST" // set the input parameter to be obtained by /local/time handler
     call-handler "/local/time"
 end-handler

 begin-handler /local/time
     get-param tzone
     get-time to curr_time timezone tzone
     set-param curr_time // set the return parameter to be obtained by the caller
 end-handler

 begin-handler /some/service
     set-param tzone="EST" // set input parameter used by "/local/time"
     call-handler "/local/time"
     get-param curr_time // get parameter that was set by "/local/time"
     @<div>Current time is <<p-out curr_time>></div>
 end-handler

 begin-handler /check/even
     get-param num type number // get input parameter
     if-true num every 2
         set-param is_even = true // set output parameter
     else-if
         set-param is_even = false // set output parameter
     end-if
 end-handler

 begin-handler /some/task
     set-param num = 23 // set input parameter for /check/even
     call-handler "/check/even"
     get-param is_even type bool //get output from /check/even
     if-true is_even equal true
         @EVEN
     else-if
         @ODD
     end-if
 end-handler

 %% /insert public
     get-param key
     get-param value
     run-query @mydb = "insert into key_value(key,value) values ('%s', '%s')" input key, value error err affected-rows aff_rows no-loop
     @Error <<p-out err>>, affected rows <<p-num aff_rows>>
 %%

 before-handler
 ...
 end-before-handler

 before-handler
     @Getting Started!!
 end-before-handler

 begin-handler <request path> [ private | public ]
     <any code>
 end-handler

 begin-handler  /items/wines/red-wine public
     @This is a request handler to display a list of red wines!
 end-handler

 %%  /items/wines/red-wine public
     @This is a request handler to display a list of red wines!
 %%

 begin-transaction [ @<database> ] \
     [ on-error-continue | on-error-exit ] \
     [ error <error> ] [ error-text <error text> ] \
     [ options <options> ]

 begin-transaction @mydb
 run-query @mydb="insert into employee (name, dateOfHire) values ('%s', now())" input "Terry" no-loop
 commit-transaction @mydb

 break-loop

 set-number max_loop = 300
 start-loop repeat 1000 use i start-with 1
     @Completed <<p-num i>> loops so far
     if-true i equal max_loop
         break-loop
     end-if
 end-loop

 call-extended <function> "( " [ & ]<variable>  [ , ... ]  " )"

 #include "gliim.h"

 // Compute factorial of f, and store result into res
 void factorial(gg_num f, gg_num *res)
 {
     *res = 1;
     gg_num i;
     for (i = 2; i <= f; i++) {
         *res *= i;
     }
 }

 void factorial(gg_num f, gg_num *res);

 void factorial(gg_num f, gg_num *res);

 #define mod10(n, m) m=(n)%10

 extended-mode

 begin-handler /fact public
     set-number fact
     call-extended factorial (10, &fact)
     p-num fact
 end-handler

 extended-mode

 begin-handler /mod public
     set-number mod
     call-extended mod10(103, mod)
     p-num mod
 end-handler

 call-handler <request path>

 %% /callsub public
     //
     // First call to call-handler
     //
     // Set input for call-handler
     set-param inp = "some string"
     (( s
     call-handler "/sub/service"
     ))
     // Get output from call-handler
     get-param out type string
     @<<p-out s>> with output [<<p-out out>>]

     //
     // Second call to call-handler
     //
     // Set input for call-handler called as inline code
     set-param inp = "new string"
     (( s
     @Output: <<call-handler "/sub/service">>
     ))
     // Get output from call-handler
     get-param out type string
     @<<p-out s>> with output [<<p-out out>>]
 %%

 %% /sub/service private
     @This is sub!
     get-param inp
     (( out
     @got input: <<p-out inp>>
     ))
     set-param out = out
 %%

 call-remote <service> [ ,... ]   \
     [ status <status> ]  \
     [ started <started> ] \
     [ finished-okay <finished okay> ]

 // Create single call
 new-remote srv location "/var/lib/gg/app_name/sock/sock" \
     method "GET" app-path "/app_name" request-path "/server" \
     url-params "/op=add/key=2"
 // Call single service call
 call-remote srv finished-okay sfok
 // Get results of a remote service call
 read-remote srv data rdata
 // Display results
 @Data from service is <<p-out rdata>>

 new-remote srv location "192.168.0.28:2400" \
     method "GET" app-path "/app_name" request-path "/server" \
     url-params "/op=add/key=2"

 call-web <URL> \
     response <result> \
     [ response-code <response code> ] \
     [ response-headers <headers> ] \
     [ status <status> ] \
     [ method <request method> ] \
     [ request-headers \
         [ content-type <content type> ] \
         [ content-length <content length> ] \
         custom <header name>=<header value> [ , ... ] ] \
     [ request-body \
         ( [ fields <field name>=<field value> [ , ... ] ] \
             [ files <file name>=<file location> [ , ... ] ] ) \
         | \
         ( content <body content> ) \
     ] \
     [ error <error> ] \
     [ cert <certificate> | no-cert ] \
     [ cookie-jar <cookie jar> ] \
     [ timeout <timeout> ]

 call-web "http://website.com/app_name/some_request" response resp response-code rc status len \
     request-body fields "source"="web","act"="setcookie"

 call-web "http://website.com" response resp response-code rc status len \
     request-body files "file1"="uploadtest.jpg", "file23"="fileup4.pdf"

 call-web "http://website.com/app_name/some_request" response resp response-code rc
     request-body fields "source"="web","act"="setcookie" \
         files "file1"="uploadtest.jpg", "file23"="fileup4.pdf" \
     status st error err

 call-web "https://website.com" response resp \
     request-headers content-type "application/json" \
     request-body content "{ \
         \"employee\": { \
             \"name\":       \"sonoo\", \
             \"salary\":      56000, \
             \"married\":    true \
         } \
     }"

 read-file "somefile" to file_contents status file_length
 call-web "https://website.com" response resp \
     request-headers content-type "image/jpeg" \
     request-headers content-length file_length \
     request-body content file_contents

 call-web "https://<web address>/resource" \
     request-headers content-type "application/json" \
     request-body content some_json

 call-web "http://website.com/<app name>/<request name>?act=get_file" response resp response-code rc status len \
     request-headers custom "Golf-header"="Some_ID", "Another-Header"="New_ID"

 get-req header "Golf-header" to hvh0
 get-req header "Another-Header" to hvh1

 call-web "https://website.com/page.html" response resp
 p-out resp

 call-web "https://website.com/images/someimg.jpg" status wlen response resp
 write-file "pic.jpg" from resp length wlen

 int gg_cli_request (gg_cli *req);

 // Define and initialize request variable
 gg_cli req = {0};
 // You could also do:
 // memset ((char*)&req, 0, sizeof(gg_cli));
 ...
 // Set members of 'req' variable (see below)
 ...
 // Make a call
 int result = gg_cli_request (&req);

 typedef struct {
     const char *server; // the IP:port/socket_path to server
     const char *req_method; // request method
     const char *app_path; // application path
     const char *req; // request name
     const char *url_params; // URL params (path+query string)
     const char *content_type; // content type
     int content_len; // content len
     const char *req_body; // request body (i.e. content)
     char **env; // environment to pass to servicde
     int timeout; // timeout for request
     int req_status; // status of request from service
     int data_len; // length of response from service
     int error_len; // length of error from service
     char *errm; // error message when gg_cli_request returns other than GG_OKAY
     gg_cli_out_hook out_hook; // hook to get data output as soon as it arrives
     gg_cli_err_hook err_hook; // hook get error output as soon as it arrives
     gg_cli_done_hook done_hook; // get all data when request is complete
     int thread_id; // custom ID when executing in a multithreaded fashion
     volatile char done; // indicator that the request has completed
     int return_code; // the return code from gg_cli_request()
 } gg_cli;

 char *env[5];
 env[0] = "REMOTE_USER";
 env[1] = "John"
 env[2] = "MY_VARIABLE";
 env[3] = "8000"
 env[4] = NULL;

 // Declare and initialize request variable
 gg_cli req = {0};
 // Setup the req variable
 ...
 // Execute request
 if (gg_cli_request (&req) == GG_OKAY) {
     char *data = gg_cli_data (req); // data response
     int data_len = req->data_len; // length of data response in bytes
 }

 // Declare and initialize request variable
 gg_cli req = {0};
 // Setup the req variable
 ...
 // Execute request
 if (gg_cli_request (&req) == GG_OKAY) {
     char *err = gg_cli_error (req); // error response
     int err_len = req->error_len; // length of error response in bytes
 }

 // Declare and initialize request variable
 gg_cli req = {0};
 // Setup the req variable
 ...
 // Execute request
 gg_cli_request (&req);
 // .. Use the result ..
 // Free request output (data and error streams)
 gg_cli_delete (&req);

 typedef void (*gg_cli_done_hook)(char *recv, int recv_len, char *err, int err_len, gg_cli *req);

 typedef void (*gg_cli_out_hook)(char *recv, int recv_len, gg_cli *req);

 typedef void (*gg_cli_err_hook)(char *err, int err_len, gg_cli *req);

 // Output hook
 void get_output(char *d, int l, gg_cli *req)
 {
     printf("Got output of [%.*s] of length [%d] in thread [%d]", l, d, l, req->thread_id);
 }

 // Error hook
 void get_err(char *d, int l, gg_cli *req)
 {
     printf("Got error of [%.*s] of length [%d], status [%d]", l, d, l, req->req_status);
 }

 // Completion hook
 void get_complete(char *data, int data_len, char *err, int err_len, gg_cli *req)
 {
     printf("Got data [%.*s] of length [%d] and error of [%.*s] of length [%d], status [%d], thread [%d]\n", data_len, data, data_len, err_len, err, err_len, req->req_status, req->thread_id);
 }

 ...

 gg_cli req = {0};
 ...
 // Register output and error hooks, as well as a completion hook
 req.out_hook = &get_output;
 req.err_hook = &get_err;
 req.done_hook = &get_complete;

 #include "gcli.h"

 void main ()
 {
     // Request type gg_cli - create a request variable and zero it out
     gg_cli req = {0};

     req.server = "/var/lib/gg/helloworld/sock/sock"; // Unix socket
     req.req_method = "GET"; // GET HTTP method
     req.app_path = "/helloworld"; // application path
     req.req = "/hello-simple"; // request name

     // Make a request
     int res = gg_cli_request (&req);

     // Check return status, and if there's an error, display error code and the
     // corresponding error message. Otherwise, print out service response.
     if (res != GG_OKAY) printf("Request failed [%d] [%s]\n", res, req.errm);
     else printf("%s", gg_cli_data(&req));

     // Free up resources so there are no memory leaks
     gg_cli_delete(&req);
 }

 begin-handler /hello_simple public
    silent-header
    @Hi there!
 end-handler

 Hi there!

 #include "gcli.h"

 void main ()
 {
     // Request type gg_cli - create a request variable
     gg_cli req;
     // Initialize request
     memset (&req, 0, sizeof(req));

     // Add 3 environment variables (in the form of name, value, name, value, ... , NULL)
     char *env[] = { "REMOTE_USER", "John", "SOME_VAR", "SOME\nVALUE", "NEW_VAR", "1000", NULL };

     // Create a request
     // Environment variables to pass to service request
     req.env = env;
     // Server IP and port
     req.server = "127.0.0.1:2301";
     // Request method
     req.req_method = "GET";
     // Application path
     req.app_path = "/helloworld";
     // Request
     req.req = "/hello";
     // URL parameters (path and query string)
     req.url_params = "par1=val1&par2=91";
     // Content type
     req.content_type = "application/json";
     // Content (i.e. request body)
     req.req_body = "This is request body";
     // Content length
     req.content_len = strlen (req.req_body);
     // No timeout (set to 0)
     req.timeout = 0;

     // Make a request
     int res = gg_cli_request (&req);

     // Check return status, and if there's an error, display error code and the
     // corresponding error message
     if (res != GG_OKAY) printf("Request failed [%d] [%s]\n", res, req.errm);
     else {
        // If successful, display request results
        // Exit code from the service processing
        printf("Server status %d\n", req.req_status);
        // Length of reply from service
        printf("Len of data %d\n", req.data_len);
        // Length of any error from service
        printf("Len of error %d\n", req.error_len);
        // Reply from service
        printf("Data [%s]\n", gg_cli_data(&req));
        // Any error message from service
        printf("Error [%s]\n", gg_cli_error(&req));
     }

     // Free up resources so there are no memory leaks
     gg_cli_delete(&req);
 }

 req.url_params = "/par1/val1?par2=91";

 req.url_params = "/par1=val1/par2=91";

 begin-handler /hello public
     silent-header

     // Get request body
     request-body rb

     // Input params
     get-param par1
     get-param par2

     // Get environment variables passed on from the client
     get-sys environment "REMOTE_USER" to ruser
     get-sys environment "SOME_VAR" to somev
     get-sys environment "NEW_VAR" to newv

     // Output, print the environment variables, the PID of server process and the request body received from the client
     get-req process-id to pid
     @Hello World! [<<p-out ruser>>] [<<p-out somev>>] [<<p-out newv>>] [<<p-out par1>>] [<<p-out par2>>] <<p-num pid>> <<p-out rb>>

     // Output back a number of lines, generally as "Output line #<num of line>"
     // After line #1418, print out "Line 1419 has an error" to stderr
     // After line #4418, report an error and exit
     // This demostrates outputting data to both stdout and stderr
     start-loop repeat 8000 use i start-with 0
         @Output line #<<p-num i>>
         if-true i equal 1419
             pf-out "Line %ld has an error\n", i to-error
         end-if
         if-true i equal 4419
             // Exit code of the service execution
             handler-status 82
             report-error "%s", "Some error!"
         end-if
     end-loop
 end-handler

 close-file file-id <file id> \
     [ status <status> ]

 begin-handler /scope public
     @<<p-out s1>>
     set-string s1="outside"
     {
         set-string s2="inner variable"
         set-string s1="inside"
         @<<p-out s1>>
     }
     @<<p-out s1>>
 end-handler

 commit-transaction [ @<database> ] \
     [ on-error-continue | on-error-exit ] \
     [ error <error> ] [ error-text <error text> ] \
     [ options <options> ]

 begin-transaction @mydb
 run-query @mydb="insert into employee (name, dateOfHire) values ('Terry', now())"
 run-query @mydb="insert into payroll (name, salary) values ('Terry', 100000)"
 commit-transaction @mydb

 continue-loop

 define-number cont_loop = 300
 start-loop repeat 1000 use i start-with 1
     if-true i equal cont_loop
         continue-loop
     end-if
     @Completed <<p-num i>> loops so far
 end-loop

 copy-file <source file> to <target file> [ status <status> ]

 copy-file "/home/user/source_file" to "/home/user/target_file" status st

 copy-string <source string> to <dest string> \
     [ start-with <start with> ] \
     [ length <length> ]

 set-string str = "original string" // string to change

 set-string orig = str // references original copy of the string to change

 copy-string str to str // make a copy of string to change and assign it to itself

 upper-string str // change the copy

 // Now "str" references "ORIGINAL STRING" 
 // and "orig" references "original string"

 set-string other_string="some value"
 copy-string other_string to my_str

 set-string other_string="some value"
 copy-string other_string to my_str length 3 start-with 1

 count-substring <substring> in <string> to <count> [ case-insensitive [ <case insensitive> ] ]

 set-string sub = "world"
 set-string str = "Hello world and hello World!"

 count-substring sub in str to num_occ
 pf-out "Found %ld occurrences!\n", num_occ

 count-substring sub in str to num_occ case-insensitive
 pf-out "Found %ld occurrences!\n", num_occ

 current-row [ to <current row> ]

 run-query @mydb="select firstName, lastName from employee" output firstName, lastName
     @Row #<<current-row>><br/>
     p-out firstName
     @,
     p-out lastName
     @<br/>
 end-query

 gg ... --db="mariadb:db1 postgres:db2 sqlite:db3"  ...

 run-query @mydb="select name from employees"
 ...
 end-query

 gg ... --db="postgres:mydb"  ...

 run-query ="select name from employees"
 ...
 end-query

 db-error [ @<database> ] ( exit | continue )

 db-error @mydb continue

 decode-base64 <data> to <output data> \
     [ input-length <input length> ]

 decode-hex <data> to <output> \
     [ input-length <input length> ]

 set-string hexdata = "0041000F414200"
 decode-hex hexdata to binout

 "\x00""A""\x00""\xF""AB""\x00""\x04"

 decode-url <string> [ input-length <length> ] [ status <status> ]

 decode-url str

 decode-web <string> [ input-length <length> ]

 decode-web str

 decrypt-data <data> to <result> \
     [ input-length <input length> ] \
     [ binary [ <binary> ] ] \
     ( password <password> \
         [ salt <salt> [ salt-length <salt length> ] ] \
         [ iterations <iterations> ] \
         [ cipher <cipher algorithm> ] \
         [ digest <digest algorithm> ]
         [ cache ]
         [ clear-cache <clear cache> ) \
     [ init-vector <init vector> ]

 delete-cookie <cookie name> [ path <cookie path> ] [ status <status> ] [ secure <secure> ]

 delete-cookie "my_cookie"
 set-bool is_secure = true
 delete-cookie "my_cookie" path "/path" secure is_secure

 delete-fifo <list>