重试请求，直到 API 返回正确的值，然后继续进一步的请求

Question

我需要在 Postman 中重试特定请求，直到任务被解锁。 我不知道要花多长时间，可能是1秒到1分钟。 由于异步行为，下面的脚本似乎并不总是有效。

您在这里推荐什么样的解决方案？

function checkIfTaskIsLocked(responseJson) {
    if(responseJson.items && responseJson.items(taskId) {
    if (responseJson.items[taskId].isLocked === false {
    return true;
    } else {
        console.log("task is locked");
        return false
    }
} else {
    console.log("task not found")
    return false;
}
}

if(!checkIfTaskIsLocked(responseJson)) {
    console.log("retrying request")
    setTimeout(function() {
        pm.execution.setNextRequest(pm.info.requestName)
    }, 10000)
}

Answer 1

这应该做：

var maxNumberOfTries = 12; // Retry up to 12 times
var sleepBetweenTries = 5000; // 5 seconds between tries

// Helper function to check if the task is locked
function checkIfTaskIsLocked(responseJson) {
    if (responseJson.items && responseJson.items[taskId]) {
        if (responseJson.items[taskId].isLocked === false) {
            return true;
        } else {
            console.log("Task is locked");
            return false;
        }
    } else {
        console.log("Task not found");
        return false;
    }
}

// Initialize or increment the retry count
if (!pm.environment.get("collection_tries")) {
    pm.environment.set("collection_tries", 1);
} else {
    var tries = parseInt(pm.environment.get("collection_tries"), 10);
    pm.environment.set("collection_tries", tries + 1);
}

// Check if the task is unlocked or if the maximum number of tries has been reached
if (!checkIfTaskIsLocked(responseJson) && pm.environment.get("collection_tries") < maxNumberOfTries) {
    console.log("Retrying request... Attempt: " + pm.environment.get("collection_tries"));
    setTimeout(function() {
        postman.setNextRequest(pm.info.requestName); // Retry the same request
    }, sleepBetweenTries);
} else {
    // Reset the retry count after success or reaching the max number of tries
    pm.environment.unset("collection_tries");

    // You can add tests or other logic here
    pm.test("Task unlocked or max retries reached", function() {
        pm.expect(checkIfTaskIsLocked(responseJson)).to.be.true;
    });
}

它基于一个解决方案，我发明的解决方案仅在我得到好的答案时执行测试：https://community.postman.com/t/retry-a-failing-request/5934