如何在JMeter中发送无需转义字符的HTTP请求？

Let's break down your problem: you want to send a JSON-RPC request where the data array contains a JSON string, but you don't want that inner string to get double-escaped (e.g., turning \" into \\\"). The key is to let your language's JSON serialization handle escaping correctly instead of doing it manually.

Here's how to implement this in common languages and tools:

Python Solution #

Use the built-in json module to first serialize the inner event data, then embed that string into your request payload before serializing the whole thing. This ensures only one level of valid escaping:

import json

# Step 1: Define your inner event data as a Python dictionary
event_data = {
    "parent_process_path": "C:\\disk2\\process.exe",
    "command_line": "\"C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\ngen.exe\" uninstall \"C:\\Windows\\assembly\\NativeImages_v4.0.30319_32\\Microsoft.W2d29a719#\\fdb201638092fc8d1310350e099eba45\\Micros..."
}

# Step 2: Serialize the inner data to a JSON string (handles first-level escaping)
event_data_str = json.dumps(event_data)

# Step 3: Build the full request payload
request_payload = {
    "id": "a",
    "jsonrpc": "2.0",
    "method": "addJsonEvent",
    "params": {
        "common_fields": {
            "source_hwid": "${HWID}",
            "api_key": "${custid}"
        },
        "data": [event_data_str]
    }
}

# Step 4: Serialize the entire request for sending
final_request = json.dumps(request_payload)
# Send final_request via HTTP (e.g., using requests library)

When you run this, the final_request will have the inner string properly escaped once—no double-escaping mess.

JavaScript Solution #

Similarly, use JSON.stringify() in two steps: first for the inner data, then for the full request:

// Step 1: Define the inner event data as an object
const eventData = {
    parent_process_path: "C:\\disk2\\process.exe",
    command_line: "\"C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\ngen.exe\" uninstall \"C:\\Windows\\assembly\\NativeImages_v4.0.30319_32\\Microsoft.W2d29a719#\\fdb201638092fc8d1310350e099eba45\\Micros..."
};

// Step 2: Serialize inner data to a string
const eventDataStr = JSON.stringify(eventData);

// Step 3: Build the full request payload
const requestPayload = {
    id: "a",
    jsonrpc: "2.0",
    method: "addJsonEvent",
    params: {
        common_fields: {
            source_hwid: "${HWID}",
            api_key: "${custid}"
        },
        data: [eventDataStr]
    }
};

// Step 4: Serialize the full request
const finalRequest = JSON.stringify(requestPayload);
// Send finalRequest via HTTP (e.g., using fetch or axios)

Manual Raw JSON (Postman/Curl) #

If you're writing JSON manually (like in Postman's raw mode), follow strict JSON escaping rules:

• Escape backslashes with another backslash (\\ becomes \\\\)
• Escape double quotes inside the inner string with a backslash (" becomes \"), which in the outer JSON will appear as \\\" (since the outer JSON also escapes backslashes)

Here's the correct raw JSON:

{
    "id": "a",
    "jsonrpc": "2.0",
    "method": "addJsonEvent",
    "params": {
        "common_fields": {
            "source_hwid": "${HWID}",
            "api_key": "${custid}"
        },
        "data": [
            "{\"parent_process_path\": \"C:\\\\disk2\\\\process.exe\", \"command_line\": \"\\\"C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v4.0.30319\\\\ngen.exe\\\" uninstall \\\"C:\\\\Windows\\\\assembly\\\\NativeImages_v4.0.30319_32\\\\Microsoft.W2d29a719#\\\\fdb201638092fc8d1310350e099eba45\\\\Micros...\"}"
        ]
    }
}

Why Manual Escaping Fails #

If you try to write the inner string with manual \" and then serialize it, the JSON library will escape the backslash (turning \ into \\) and the quote (turning " into \"), leading to \\\"—double-escaping that breaks your payload. Letting the serialization library handle it in two steps avoids this headache.

内容的提问来源于stack exchange，提问作者Catalin B