CDN:EdgeScript syntax

Dictionary literals

A dictionary can be either index-based or key-based.

Index-based — values are accessed by numeric index:

['key1', 'key2', 100]

This creates:

• 1 -> 'key1'

• 2 -> 'key2'

• 3 -> '100'

Key-based — values are accessed by string key:

['key1' = 'value1', 'key2' = '1000']

This creates:

• 'key1' -> 'value1'

• 'key2' -> 1000

An empty string is represented as [].

Reference built-in variables

Reference a built-in variable by name:

host

To emphasize that a variable is built-in, prefix it with $:

$host

Reference custom variables

Reference a custom variable by name:

seckey

Naming constraints

Custom variables cannot share a name with built-in variables. For a list of built-in variables, see EdgeScript built-in variables.

Condition clause

if condition {
    ...
}

Variants:

# Nested if
if condition1 {
    if condition2 {
        ...
    }
}

# if-else
if condition {
    ...
} else {
    ...
}

A condition can contain a literal constant, a variable, or a function call. The body can be empty or contain multiple statements — one statement per line. Statement nesting is supported.

Coding style: The opening brace ({) must be on the same line as if condition.

for loop

Use for loops to traverse dictionary or array data:

for k, v in <array_or_dict> {
    ...
}

Example 1: Traverse an index-based dictionary

# Traverse an index-based dictionary and return when value equals 'c'
a = ['a', 'b', 'c', 'd']
def for_func () {
    for k, v in a {
        if eq(v, 'c') {
            return true
        }
    }
}
for_func()

Example 2: Traverse a key-based dictionary

# Traverse a key-based dictionary and return when key equals 'c'
a = ['a' = 1, 'b' = 2, 'c' = 3, 'd' = 4, 'e' = 5, 'f' = 6]
def for_func () {
    for k, v in a {
        if eq(k, 'c') {
            return true
        }
    }
}
for_func()

Example 3: Nested loops

# Nested loops across three index-based dictionaries
num = 0
def for_func () {
    a = [0,1,2,3,4,5,6,7,8,9]
    for k ,v in a {
        b = [0,1,2,3,4,5,6,7,8,9]
        for k1 ,v1 in b {
            c = [0,1,2,3,4,5,6,7,8,9]
            for k2 ,v2 in c {
                num = add(num, 1)
                if and(eq(v, 3), eq(v1, 5), eq(v2, 7)) {
                    return true
                }
            }
        }
    }
}
for_func()

Coding style: The opening brace ({) must be on the same line as the for statement.

Define a function

def function_name(parameter_list) {
    ...
}

• The parameter list can be empty or contain multiple parameters separated by commas (,).

• The body can be empty or contain multiple statements — one statement per line.

• Use return to return a value and exit the function.

Coding style: The opening brace ({) must be on the same line as the function definition.

Call a function

Use the function name followed by parentheses for both built-in and custom functions:

function_name()