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[HTML5] Add easy to use download API. 

New `JavaScript.download_buffer` method to create a prompt that let the
user download a file.
This commit is contained in:
Fabio Alessandrelli 2021-05-19 15:51:36 +02:00
parent c311b4c039
commit bf078814cc
8 changed files with 51 additions and 61 deletions
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16
doc/classes/JavaScript.xml
View File

@ -31,6 +31,22 @@
Creates a new JavaScript object using the [code]new[/code] constructor. The [code]object[/code] must a valid property of the JavaScript [code]window[/code]. See [JavaScriptObject] for usage.
</description>
</method>
<method name="download_buffer">
<return type="void">
</return>
<argument index="0" name="buffer" type="PoolByteArray">
</argument>
<argument index="1" name="name" type="String">
</argument>
<argument index="2" name="mime" type="String" default="&quot;application/octet-stream&quot;">
</argument>
<description>
Prompts the user to download a file containing the specified [code]buffer[/code]. The file will have the given [code]name[/code] and [code]mime[/code] type.
[b]Note:[/b] The browser may override the [url=https://en.wikipedia.org/wiki/Media_type]MIME type[/url] provided based on the file [code]name[/code]'s extension.
[b]Note:[/b] Browsers might block the download if [method download_buffer] is not being called from a user interaction (e.g. button click).
[b]Note:[/b] Browsers might ask the user for permission or block the download if multiple download requests are made in a quick succession.
</description>
</method>
<method name="eval">
<return type="Variant">
</return>

2
platform/javascript/SCsub
View File

@ -22,8 +22,6 @@ sys_env.AddJSLibraries(
]
)
if env["tools"]:
sys_env.AddJSLibraries(["js/libs/library_godot_editor_tools.js"])
if env["javascript_eval"]:
sys_env.AddJSLibraries(["js/libs/library_godot_javascript_singleton.js"])

5
platform/javascript/api/api.cpp
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@ -70,6 +70,7 @@ void JavaScript::_bind_methods() {
mi.arguments.push_back(PropertyInfo(Variant::STRING, "object"));
ClassDB::bind_vararg_method(METHOD_FLAGS_DEFAULT, "create_object", &JavaScript::_create_object_bind, mi);
}
ClassDB::bind_method(D_METHOD("download_buffer", "buffer", "name", "mime"), &JavaScript::download_buffer, DEFVAL("application/octet-stream"));
}
#if !defined(JAVASCRIPT_ENABLED) || !defined(JAVASCRIPT_EVAL_ENABLED)
@ -100,3 +101,7 @@ Variant JavaScript::_create_object_bind(const Variant **p_args, int p_argcount,
return Ref<JavaScriptObject>();
}
#endif
#if !defined(JAVASCRIPT_ENABLED)
void JavaScript::download_buffer(Vector<uint8_t> p_arr, const String &p_name, const String &p_mime) {
}
#endif

1
platform/javascript/api/javascript_singleton.h
View File

@ -58,6 +58,7 @@ public:
Ref<JavaScriptObject> get_interface(const String &p_interface);
Ref<JavaScriptObject> create_callback(Object *p_ref, const StringName &p_method);
Variant _create_object_bind(const Variant **p_args, int p_argcount, Variant::CallError &r_error);
void download_buffer(Vector<uint8_t> p_arr, const String &p_name, const String &p_mime = "application/octet-stream");
static JavaScript *get_singleton();
JavaScript();

9
platform/javascript/api/javascript_tools_editor_plugin.cpp
View File

@ -41,7 +41,7 @@
// JavaScript functions defined in library_godot_editor_tools.js
extern "C" {
extern void godot_js_editor_download_file(const char *p_path, const char *p_name, const char *p_mime);
extern int godot_js_os_download_buffer(const uint8_t *p_buf, int p_buf_size, const char *p_name, const char *p_mime);
}
static void _javascript_editor_init_callback() {
@ -70,7 +70,12 @@ void JavaScriptToolsEditorPlugin::_download_zip(Variant p_v) {
String base_path = resource_path.substr(0, resource_path.rfind("/")) + "/";
_zip_recursive(resource_path, base_path, zip);
zipClose(zip, NULL);
godot_js_editor_download_file("/tmp/project.zip", "project.zip", "application/zip");
FileAccess *f = FileAccess::open("/tmp/project.zip", FileAccess::READ);
ERR_FAIL_COND_MSG(!f, "Unable to create zip file");
Vector<uint8_t> buf;
buf.resize(f->get_len());
f->get_buffer(buf.ptrw(), buf.size());
godot_js_os_download_buffer(buf.ptr(), buf.size(), "project.zip", "application/zip");
}
void JavaScriptToolsEditorPlugin::_bind_methods() {

5
platform/javascript/javascript_singleton.cpp
View File

@ -302,6 +302,7 @@ union js_eval_ret {
};
extern int godot_js_eval(const char *p_js, int p_use_global_ctx, union js_eval_ret *p_union_ptr, void *p_byte_arr, void *p_byte_arr_write, void *(*p_callback)(void *p_ptr, void *p_ptr2, int p_len));
extern int godot_js_os_download_buffer(const uint8_t *p_buf, int p_buf_size, const char *p_name, const char *p_mime);
}
void *resize_poolbytearray_and_open_write(void *p_arr, void *r_write, int p_len) {
@ -338,3 +339,7 @@ Variant JavaScript::eval(const String &p_code, bool p_use_global_exec_context) {
}
#endif // JAVASCRIPT_EVAL_ENABLED
void JavaScript::download_buffer(Vector<uint8_t> p_arr, const String &p_name, const String &p_mime) {
godot_js_os_download_buffer(p_arr.ptr(), p_arr.size(), p_name.utf8().get_data(), p_mime.utf8().get_data());
}

57
platform/javascript/js/libs/library_godot_editor_tools.js
View File

@ -1,57 +0,0 @@
/*************************************************************************/
/* library_godot_editor_tools.js */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
const GodotEditorTools = {
godot_js_editor_download_file__deps: ['$FS'],
godot_js_editor_download_file__sig: 'viii',
godot_js_editor_download_file: function (p_path, p_name, p_mime) {
const path = GodotRuntime.parseString(p_path);
const name = GodotRuntime.parseString(p_name);
const mime = GodotRuntime.parseString(p_mime);
const size = FS.stat(path)['size'];
const buf = new Uint8Array(size);
const fd = FS.open(path, 'r');
FS.read(fd, buf, 0, size);
FS.close(fd);
FS.unlink(path);
const blob = new Blob([buf], { type: mime });
const url = window.URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = name;
a.style.display = 'none';
document.body.appendChild(a);
a.click();
a.remove();
window.URL.revokeObjectURL(url);
},
};
mergeInto(LibraryManager.library, GodotEditorTools);

17
platform/javascript/js/libs/library_godot_os.js
View File

@ -304,6 +304,23 @@ const GodotOS = {
godot_js_os_hw_concurrency_get: function () {
return navigator.hardwareConcurrency || 1;
},
godot_js_os_download_buffer__sig: 'viiii',
godot_js_os_download_buffer: function (p_ptr, p_size, p_name, p_mime) {
const buf = GodotRuntime.heapSlice(HEAP8, p_ptr, p_size);
const name = GodotRuntime.parseString(p_name);
const mime = GodotRuntime.parseString(p_mime);
const blob = new Blob([buf], { type: mime });
const url = window.URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = name;
a.style.display = 'none';
document.body.appendChild(a);
a.click();
a.remove();
window.URL.revokeObjectURL(url);
},
};
autoAddDeps(GodotOS, '$GodotOS');