I’ll provide both Python and PHP implementations to replicate your Postman workflow. Both scripts will first fetch the quantity via a GET request, then use that value in a PUT request with your specified XML payload.

Python Implementation (Using requests Library) #

First, install the requests library if you haven’t already (pip install requests). This script is straightforward and handles both API calls with basic error handling:

import requests

# Configuration - replace these with your actual API details
GET_API_URL = "https://your-shop-url.com/api/stock_availables/271"
PUT_API_URL = "https://your-shop-url.com/api/stock_availables/1445"
PRESTASHOP_API_KEY = "your-api-key-here"

def main():
    try:
        # Step 1: Fetch quantity via GET request
        get_response = requests.get(
            GET_API_URL,
            auth=(PRESTASHOP_API_KEY, "")  # PrestaShop uses API key as username, empty password
        )
        get_response.raise_for_status()  # Trigger error for HTTP status codes ≥400
        
        # Parse JSON and extract the quantity
        stock_data = get_response.json()
        quantity = stock_data["stock_available"]["quantity"]
        print(f"Fetched quantity: {quantity}")
        
        # Step 2: Build XML payload with the extracted quantity
        xml_payload = f'''<?xml version="1.0" encoding="UTF-8"?>
<prestashop xmlns:xlink="http://www.w3.org/1999/xlink">
  <stock_available>
    <id>1445</id>
    <id_product>1406</id_product>
    <id_product_attribute>0</id_product_attribute>
    <id_shop>1</id_shop>
    <id_shop_group>0</id_shop_group>
    <quantity>{quantity}</quantity>
    <depends_on_stock>0</depends_on_stock>
    <out_of_stock>2</out_of_stock>
    <location></location>
  </stock_available>
</prestashop>'''
        
        # Step 3: Send PUT request to update stock
        put_headers = {"Content-Type": "application/xml"}
        put_response = requests.put(
            PUT_API_URL,
            auth=(PRESTASHOP_API_KEY, ""),
            headers=put_headers,
            data=xml_payload
        )
        put_response.raise_for_status()
        
        print("PUT request successful! Status code:", put_response.status_code)
        print("Response content:", put_response.text)
        
    except requests.exceptions.RequestException as e:
        print(f"An error occurred: {e}")

if __name__ == "__main__":
    main()

PHP Implementation (Using cURL) #

This script uses PHP’s built-in cURL extension (no extra dependencies needed):

<?php
// Configuration - replace these with your actual API details
$getApiUrl = "https://your-shop-url.com/api/stock_availables/271";
$putApiUrl = "https://your-shop-url.com/api/stock_availables/1445";
$prestashopApiKey = "your-api-key-here";

// Step 1: Fetch quantity via GET request
$ch = curl_init($getApiUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERPWD, $prestashopApiKey . ":"); // API key as username, empty password
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);

$getResponse = curl_exec($ch);
$getHttpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

if ($getResponse === false || $getHttpCode >= 400) {
    die("GET request failed: " . curl_error($ch) . " (HTTP code: " . $getHttpCode . ")");
}
curl_close($ch);

// Parse JSON and extract quantity
$stockData = json_decode($getResponse, true);
$quantity = $stockData["stock_available"]["quantity"];
echo "Fetched quantity: " . $quantity . "\n";

// Step 2: Build XML payload with the extracted quantity
$xmlPayload = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<prestashop xmlns:xlink="http://www.w3.org/1999/xlink">
  <stock_available>
    <id>1445</id>
    <id_product>1406</id_product>
    <id_product_attribute>0</id_product_attribute>
    <id_shop>1</id_shop>
    <id_shop_group>0</id_shop_group>
    <quantity>$quantity</quantity>
    <depends_on_stock>0</depends_on_stock>
    <out_of_stock>2</out_of_stock>
    <location></location>
  </stock_available>
</prestashop>
XML;

// Step 3: Send PUT request to update stock
$ch = curl_init($putApiUrl);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_USERPWD, $prestashopApiKey . ":");
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
curl_setopt($ch, CURLOPT_POSTFIELDS, $xmlPayload);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Content-Type: application/xml",
    "Content-Length: " . strlen($xmlPayload)
]);

$putResponse = curl_exec($ch);
$putHttpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

if ($putResponse === false || $putHttpCode >= 400) {
    die("PUT request failed: " . curl_error($ch) . " (HTTP code: " . $putHttpCode . ")");
}

echo "PUT request successful! Status code: " . $putHttpCode . "\n";
echo "Response content: " . $putResponse . "\n";

curl_close($ch);
?>

Key Notes: #

• Authentication: Both scripts include basic auth, which is standard for PrestaShop APIs. Replace your-api-key-here with your actual API key.
• Endpoint URLs: Update the GET/PUT URLs to match your shop’s actual API endpoints.
• Error Handling: Basic error handling is included for HTTP failures—you can extend this to handle specific edge cases (like missing quantity in the GET response) if needed.
• XML Payload: The XML structure matches your Postman request exactly, with the dynamic quantity value inserted.

内容的提问来源于stack exchange，提问作者Fbf