node.js - 使用 Busyboy 解析多部分表单数据，获取奇怪格式的对象

Question

无法解析多部分表单数据，因为 Busyboy 的返回数据采用某种奇怪的格式。我可以在终端中看到正确的值，但是它包含一些符号，所以不能 JSON.parse 它。

JSON.parse(fields.values)

有谁知道这是哪种格式以及如何解析它？

只是无法理解它是什么格式。

任何帮助表示赞赏。

function parseMultipartForm(event) {
      return new Promise((resolve) => {
        // we'll store all form fields inside of this
        const fields = {};
    
        // let's instantiate our busboy instance!
        const busboy = new Busboy({
          // it uses request headers
          // to extract the form boundary value (the ----WebKitFormBoundary thing)
          headers: event.headers
        });
    
        // before parsing anything, we need to set up some handlers.
        // whenever busboy comes across a file ...
        busboy.on(
          "file",
          (fieldname, filestream, filename, transferEncoding, mimeType) => {
            // ... we take a look at the file's data ...
            filestream.on("data", (data) => {
              // ... and write the file's name, type and content into `fields`.
              fields\[fieldname\] = {
                filename,
                type: mimeType,
                content: data,
              };
            });
          }
        );
    
        // whenever busboy comes across a normal field ...
        busboy.on("field", (fieldName, value) => {
          // ... we write its value into `fields`.
          fields\[fieldName\] = value;
        });
    
        // once busboy is finished, we resolve the promise with the resulted fields.
        busboy.on("finish", () => {
          resolve(fields)
        });
    
        // now that all handlers are set up, we can finally start processing our request!
        busboy.write(event.body);
      });
    }
    
    exports.handler = async (event, context) => {
    
      const fields = await parseMultipartForm(event)
    
      console.log(fields)
    
    }