sample-cvk-api/upload.html at main · cloud-video-kit/sample-cvk-api · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Multipart upload</title>
  </head>
  <body>
    <label for="file">Choose file:</label>
    <input type="file" id="file" name="file" />
    <script>
      const vodModuleUrl = `/api/vod`;

      const getSupportedFiletypes = async () => {
        const response = await fetch(vodModuleUrl + "/filetypes", {
          headers: {
            "Content-Type": "application/json",
          },
        });

        const {
          fileTypes: { Audio, Caption, Video },
        } = await response.json();

        return [Audio, Caption, Video].flat();
      };

      const startUpload = async ({ title, size, name }) => {
        const response = await fetch(vodModuleUrl + "/files/start/", {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
          },
          body: JSON.stringify({
            friendlyName: title,
            fileSize: size,
            name: name,
            metadata: {},
          }),
        });

        console.log("Uploading started");

        return await response.json();
      };

      const uploadPart = async ({ blob, url }) => {
        return fetch(url, {
          method: "PUT",
          headers: {
            "Content-Type": "application/octet-stream",
            "Access-Control-Allow-Origin": "*",
          },
          body: blob,
        });
      };

      const getUploadUrlForPart = async ({ id, partNumber }) => {
        const response = await fetch(
          vodModuleUrl + `/files/${id}/part/${partNumber}`,
          {
            headers: {
              "Content-Type": "application/json",
            },
          }
        );

        return await response.json();
      };

      const uploadComplete = async ({ fileId, parts, uploadId }) => {
        return fetch(vodModuleUrl + "/files/complete/", {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
          },
          body: JSON.stringify({ fileId, parts, uploadId }),
        });
      };

      const processChunk = async ({
        fileName,
        url,
        blob,
        partNumber,
      }) => {
        try {
          const response = await uploadPart({ url, blob });
          const eTag = response.headers.get("etag");

          console.log(`Uploaded part ${partNumber} of ${fileName}`);

          return { eTag, partNumber };
        } catch (error) {
          console.error(error);
        }
      };

      const uploadFiles = async (file) => {
        const fileName = file.name;

        try {
          const { fileId, multipartUrls, uploadId, partSize, partsCount, lastPartSize } =
            await startUpload({
              title: file.name, // change this property if you want to name asset differently than the file
              name: file.name,
              size: file.size,
            });

          const itemsCountInSingleCountGroup = multipartUrls.length;
          const chunksGroupsCount = Math.ceil(
            partsCount / itemsCountInSingleCountGroup
          );
          let chunksToUpload = partsCount;
          let multipartUrlsToUpload = multipartUrls;
          let parts = [];

          for (const groupIndex of Array(chunksGroupsCount)
            .fill(undefined)
            .keys()) {
            if (groupIndex !== 0) {
              const nextChunkGroupLenght = Math.min(
                itemsCountInSingleCountGroup,
                chunksToUpload
              );
              const nextPartsUrls = await Promise.all(
                Array(nextChunkGroupLenght)
                  .fill(undefined)
                  .map((_, index) =>
                    getUploadUrlForPart({
                      id: fileId,
                      partNumber:
                        groupIndex * itemsCountInSingleCountGroup + index + 1,
                    })
                  )
              );

              multipartUrlsToUpload = nextPartsUrls
                .filter(Boolean)
                .map((item) => item.url);
            }

            const chunksData = multipartUrlsToUpload.map((url, index) => {
              const blob = file.slice(
                partSize * (groupIndex * itemsCountInSingleCountGroup + index),
                partSize *
                  (groupIndex * itemsCountInSingleCountGroup + index + 1)
              );

              const partNumber = groupIndex * itemsCountInSingleCountGroup + index + 1;
              const isLastPart = partNumber === partsCount;

              if (isLastPart) {
                if (blob.size !== lastPartSize) {
                  // If you are reimplementing this code in a different programming language, verify that the last chunk of data has the expected size
                  throw new Error('Invalid last part size');
                }
              }

              return {
                fileName,
                url,
                blob,
                partNumber:
                  groupIndex * itemsCountInSingleCountGroup + index + 1,
              };
            });

            const results = await Promise.all(
              chunksData.map(processChunk)
            );
            parts = parts.concat(results);
            chunksToUpload = chunksToUpload - chunksData.length;
          }

          if (!parts?.length) {
            return;
          }

          await uploadComplete({ fileId, parts, uploadId });
          console.log("Upload complete");
        } catch (error) {
          console.error(error);
        }
      };

      (async () => {
        const supportedFiletypes = await getSupportedFiletypes();
        const input = document.getElementById("file");
        input.setAttribute("accept", supportedFiletypes);
        input.addEventListener("change", async () => {
          if (input.files.length === 1) {
            const file = input.files[0];
            await uploadFiles(file);
          }
        });
      })();
    </script>
  </body>
</html>