Learn CURL with Real Code Examples

Updated Nov 21, 2025

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Code Sample Descriptions

cURL Counter Simulation and Theme Toggle

count=0
isDark=0

updateUI() {
    echo "Counter: $count"
    if [ $isDark -eq 1 ]; then
        echo "Theme: Dark"
    else
        echo "Theme: Light"
    fi
}

increment() {
    count=$((count+1))
    updateUI
}

decrement() {
    count=$((count-1))
    updateUI
}

reset() {
    count=0
    updateUI
}

toggleTheme() {
    isDark=$((1-isDark))
    updateUI
}

# Simulate actions
updateUI
increment
increment
toggleTheme
decrement
reset

# Example API call using cURL
# curl -X GET https://api.example.com/data -H "Authorization: Bearer TOKEN"

Demonstrates a simulated counter and theme toggle using cURL commands with local shell variables.

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cURL Simple GET Request

curl -X GET https://api.example.com/data

Performs a simple GET request using cURL.

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cURL POST Request with JSON

curl -X POST https://api.example.com/data \
-H "Content-Type: application/json" \
-d '{"name":"John","age":30}'

Sends JSON data in a POST request using cURL.

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cURL Download File

curl -O https://example.com/file.txt

Downloads a file from a URL.

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cURL Upload File

curl -X POST https://api.example.com/upload \
-F 'file=@/path/to/localfile.txt'

Uploads a file to a server using cURL.

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cURL Authentication

curl -u username:password https://api.example.com/data

Performs a request with basic authentication.

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cURL Headers Example

curl -H "Authorization: Bearer TOKEN" -H "Accept: application/json" https://api.example.com/data

Sends custom headers in a cURL request.

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cURL Save Response to File

curl https://api.example.com/data -o response.json

Saves the response of a cURL request to a local file.

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cURL Follow Redirects

curl -L https://short.url/example

Follows HTTP redirects automatically.

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cURL Timeout Example

curl --max-time 10 https://api.example.com/data

Sets a timeout for the cURL request.

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Code Sample Descriptions

cURL Counter Simulation and Theme Toggle

count=0
isDark=0

updateUI() {
    echo "Counter: $count"
    if [ $isDark -eq 1 ]; then
        echo "Theme: Dark"
    else
        echo "Theme: Light"
    fi
}

increment() {
    count=$((count+1))
    updateUI
}

decrement() {
    count=$((count-1))
    updateUI
}

reset() {
    count=0
    updateUI
}

toggleTheme() {
    isDark=$((1-isDark))
    updateUI
}

# Simulate actions
updateUI
increment
increment
toggleTheme
decrement
reset

# Example API call using cURL
# curl -X GET https://api.example.com/data -H "Authorization: Bearer TOKEN"

Demonstrates a simulated counter and theme toggle using cURL commands with local shell variables.

Let’s Try →

cURL Simple GET Request

curl -X GET https://api.example.com/data

Performs a simple GET request using cURL.

Let’s Try →

cURL POST Request with JSON

curl -X POST https://api.example.com/data \
-H "Content-Type: application/json" \
-d '{"name":"John","age":30}'

Sends JSON data in a POST request using cURL.

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cURL Download File

curl -O https://example.com/file.txt

Downloads a file from a URL.

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cURL Upload File

curl -X POST https://api.example.com/upload \
-F 'file=@/path/to/localfile.txt'

Uploads a file to a server using cURL.

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cURL Authentication

curl -u username:password https://api.example.com/data

Performs a request with basic authentication.

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cURL Headers Example

curl -H "Authorization: Bearer TOKEN" -H "Accept: application/json" https://api.example.com/data

Sends custom headers in a cURL request.

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cURL Save Response to File

curl https://api.example.com/data -o response.json

Saves the response of a cURL request to a local file.

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cURL Follow Redirects

curl -L https://short.url/example

Follows HTTP redirects automatically.

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cURL Timeout Example

curl --max-time 10 https://api.example.com/data

Sets a timeout for the cURL request.

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