FormData.create() method
FormData.create() is a Java-specific method available since v1.18 that creates a new instance of FormData and returns a FormData object.
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formdata/methods
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FormData.set() method
FormData.set() is available since v1.18 and sets a field on the form. It accepts two parameters: name (string) and value (string, boolean, int, path, or FilePayload object with name, mimeType, and buffer properties). It returns a FormData object. If the specified key already exists, set() will overwrite all existing values with the new one.
FormData.append() method
FormData.append() is available since v1.44 and appends a new value onto an existing key inside a FormData object, or adds the key if it does not already exist. It accepts two parameters: name (string) and value (string, boolean, int, path, or FilePayload object with name, mimeType, and buffer properties). It returns a FormData object. Multiple fields with the same name can be added. The difference from set() is that append() adds the new value onto the end of the existing set of values rather than overwriting.
FormData set() example with simple and file values
Example showing FormData.set() usage in Java: FormData form = FormData.create().set("firstName", "John").set("profilePicture1", Paths.get("john.jpg")).set("profilePicture2", new FilePayload("john.jpg", "image/jpeg", Files.readAllBytes(Paths.get("john.jpg")))).set("age", 30); page.request().post("http://localhost/submit", RequestOptions.create().setForm(form));
FormData append() example with simple and file values
Example showing FormData.append() usage in Java: FormData form = FormData.create().append("firstName", "John").append("attachment", Paths.get("pic.jpg")).append("attachment", new FilePayload("table.csv", "text/csv", Files.readAllBytes(Paths.get("my-tble.csv")))); page.request().post("http://localhost/submit", RequestOptions.create().setForm(form));
FormData set() Python example
Example showing FormData.set() usage in Python (async and sync): form = FormData(); form.set("firstName", "John"); form.set("profilePicture1", Path("john.jpg")); form.set("profilePicture2", {"name": "john.jpg", "mimeType": "image/jpeg", "buffer": Path("john.jpg").read_bytes()}); form.set("age", 30); await page.request.post("http://localhost/submit", multipart=form) or page.request.post("http://localhost/submit", multipart=form)
FormData append() Python example
Example showing FormData.append() usage in Python (async and sync): form = FormData(); form.append("firstName", "John"); form.append("attachment", Path("pic.jpg")); form.append("attachment", {"name": "table.csv", "mimeType": "text/csv", "buffer": Path("my-table.csv").read_bytes()}); await page.request.post("http://localhost/submit", multipart=form) or page.request.post("http://localhost/submit", multipart=form)