remove: partial downloads (remove creation of the stub messages) (#7373)

part of #7367

Author: Simon-Laux

deltachat-ffi/deltachat.h

@@ -7263,13 +7263,7 @@ void dc_event_unref(dc_event_t* event);
 /// `%1$s` will be replaced by the percentage used
 #define DC_STR_QUOTA_EXCEEDING_MSG_BODY   98
 
-/// "%1$s message"
-///
-/// Used as the message body when a message
-/// was not yet downloaded completely
-/// (dc_msg_get_download_state() is e.g. @ref DC_DOWNLOAD_AVAILABLE).
-///
-/// `%1$s` will be replaced by human-readable size (e.g. "1.2 MiB").
+/// @deprecated Deprecated 2025-11-12, this string is no longer needed.
 #define DC_STR_PARTIAL_DOWNLOAD_MSG_BODY  99
 
 /// "Multi Device Synchronization"

deltachat-rpc-client/tests/test_chatlist_events.py

@@ -1,7 +1,5 @@
 from __future__ import annotations
 
-import base64
-import os
 from typing import TYPE_CHECKING
 
 from deltachat_rpc_client import Account, EventType, const
@@ -111,40 +109,6 @@ def test_delivery_status_failed(acfactory: ACFactory) -> None:
     assert failing_message.get_snapshot().state == const.MessageState.OUT_FAILED
 
 
-def test_download_on_demand(acfactory: ACFactory) -> None:
-    """
-    Test if download on demand emits chatlist update events.
-    This is only needed for last message in chat, but finding that out is too expensive, so it's always emitted
-    """
-    alice, bob = acfactory.get_online_accounts(2)
-
-    alice_contact_bob = alice.create_contact(bob, "Bob")
-    alice_chat_bob = alice_contact_bob.create_chat()
-    alice_chat_bob.send_text("hi")
-
-    alice.set_config("download_limit", "1")
-
-    msg = bob.wait_for_incoming_msg()
-    chat_id = msg.get_snapshot().chat_id
-    msg.get_snapshot().chat.accept()
-    bob.get_chat_by_id(chat_id).send_message(
-        "Hello World, this message is bigger than 5 bytes",
-        html=base64.b64encode(os.urandom(300000)).decode("utf-8"),
-    )
-
-    message = alice.wait_for_incoming_msg()
-    snapshot = message.get_snapshot()
-    assert snapshot.download_state == const.DownloadState.AVAILABLE
-
-    alice.clear_all_events()
-
-    snapshot = message.get_snapshot()
-    chat_id = snapshot.chat_id
-    alice._rpc.download_full_message(alice.id, message.id)
-
-    wait_for_chatlist_specific_item(alice, chat_id)
-
-
 def get_multi_account_test_setup(acfactory: ACFactory) -> [Account, Account, Account]:
     alice, bob = acfactory.get_online_accounts(2)
 

deltachat-rpc-client/tests/test_something.py

@@ -336,7 +336,7 @@ def test_receive_imf_failure(acfactory) -> None:
     alice_contact_bob = alice.create_contact(bob, "Bob")
     alice_chat_bob = alice_contact_bob.create_chat()
 
-    bob.set_config("fail_on_receiving_full_msg", "1")
+    bob.set_config("simulate_receive_imf_error", "1")
     alice_chat_bob.send_text("Hello!")
     event = bob.wait_for_event(EventType.MSGS_CHANGED)
     assert event.chat_id == bob.get_device_chat().id
@@ -345,12 +345,12 @@ def test_receive_imf_failure(acfactory) -> None:
     snapshot = message.get_snapshot()
     assert (
         snapshot.text == "❌ Failed to receive a message:"
-        " Condition failed: `!context.get_config_bool(Config::FailOnReceivingFullMsg).await?`."
+        " Condition failed: `!context.get_config_bool(Config::SimulateReceiveImfError).await?`."
         " Please report this bug to delta@merlinux.eu or https://support.delta.chat/."
     )
 
     # The failed message doesn't break the IMAP loop.
-    bob.set_config("fail_on_receiving_full_msg", "0")
+    bob.set_config("simulate_receive_imf_error", "0")
     alice_chat_bob.send_text("Hello again!")
     message = bob.wait_for_incoming_msg()
     snapshot = message.get_snapshot()
@@ -591,94 +591,6 @@ def test_mdn_doesnt_break_autocrypt(acfactory) -> None:
     assert snapshot.show_padlock
 
 
-def test_reaction_to_partially_fetched_msg(acfactory, tmp_path):
-    """See https://github.com/deltachat/deltachat-core-rust/issues/3688 "Partially downloaded
-    messages are received out of order".
-
-    If the Inbox contains X small messages followed by Y large messages followed by Z small
-    messages, Delta Chat first downloaded a batch of X+Z messages, and then a batch of Y messages.
-
-    This bug was discovered by @Simon-Laux while testing reactions PR #3644 and can be reproduced
-    with online test as follows:
-    - Bob enables download limit and goes offline.
-    - Alice sends a large message to Bob and reacts to this message with a thumbs-up.
-    - Bob goes online
-    - Bob first processes a reaction message and throws it away because there is no corresponding
-      message, then processes a partially downloaded message.
-    - As a result, Bob does not see a reaction
-    """
-    download_limit = 300000
-    ac1, ac2 = acfactory.get_online_accounts(2)
-    ac1_addr = ac1.get_config("addr")
-    chat = ac1.create_chat(ac2)
-    ac2.set_config("download_limit", str(download_limit))
-    ac2.stop_io()
-
-    logging.info("sending small+large messages from ac1 to ac2")
-    msgs = []
-    msgs.append(chat.send_text("hi"))
-    path = tmp_path / "large"
-    path.write_bytes(os.urandom(download_limit + 1))
-    msgs.append(chat.send_file(str(path)))
-    for m in msgs:
-        m.wait_until_delivered()
-
-    logging.info("sending a reaction to the large message from ac1 to ac2")
-    # TODO: Find the reason of an occasional message reordering on the server (so that the reaction
-    # has a lower UID than the previous message). W/a is to sleep for some time to let the reaction
-    # have a later INTERNALDATE.
-    time.sleep(1.1)
-    react_str = "\N{THUMBS UP SIGN}"
-    msgs.append(msgs[-1].send_reaction(react_str))
-    msgs[-1].wait_until_delivered()
-
-    ac2.start_io()
-
-    logging.info("wait for ac2 to receive a reaction")
-    msg2 = Message(ac2, ac2.wait_for_reactions_changed().msg_id)
-    assert msg2.get_sender_contact().get_snapshot().address == ac1_addr
-    assert msg2.get_snapshot().download_state == DownloadState.AVAILABLE
-    reactions = msg2.get_reactions()
-    contacts = [Contact(ac2, int(i)) for i in reactions.reactions_by_contact]
-    assert len(contacts) == 1
-    assert contacts[0].get_snapshot().address == ac1_addr
-    assert list(reactions.reactions_by_contact.values())[0] == [react_str]
-
-
-@pytest.mark.parametrize("n_accounts", [3, 2])
-def test_download_limit_chat_assignment(acfactory, tmp_path, n_accounts):
-    download_limit = 300000
-
-    alice, *others = acfactory.get_online_accounts(n_accounts)
-    bob = others[0]
-
-    alice_group = alice.create_group("test group")
-    for account in others:
-        chat = account.create_chat(alice)
-        chat.send_text("Hello Alice!")
-        assert alice.wait_for_incoming_msg().get_snapshot().text == "Hello Alice!"
-
-        contact = alice.create_contact(account)
-        alice_group.add_contact(contact)
-
-    bob.set_config("download_limit", str(download_limit))
-
-    alice_group.send_text("hi")
-    snapshot = bob.wait_for_incoming_msg().get_snapshot()
-    assert snapshot.text == "hi"
-    bob_group = snapshot.chat
-
-    path = tmp_path / "large"
-    path.write_bytes(os.urandom(download_limit + 1))
-
-    for i in range(10):
-        logging.info("Sending message %s", i)
-        alice_group.send_file(str(path))
-        snapshot = bob.wait_for_incoming_msg().get_snapshot()
-        assert snapshot.download_state == DownloadState.AVAILABLE
-        assert snapshot.chat == bob_group
-
-
 def test_markseen_contact_request(acfactory):
     """
     Test that seen status is synchronized for contact request messages

python/tests/test_1_online.py

@@ -1,7 +1,6 @@
 import os
 import queue
 import sys
-import base64
 from datetime import datetime, timezone
 
 import pytest
@@ -222,38 +221,6 @@ def test_webxdc_huge_update(acfactory, data, lp):
     assert update["payload"] == payload
 
 
-def test_webxdc_download_on_demand(acfactory, data, lp):
-    ac1, ac2 = acfactory.get_online_accounts(2)
-    acfactory.introduce_each_other([ac1, ac2])
-    chat = acfactory.get_accepted_chat(ac1, ac2)
-
-    msg1 = Message.new_empty(ac1, "webxdc")
-    msg1.set_text("message1")
-    msg1.set_file(data.get_path("webxdc/minimal.xdc"))
-    msg1 = chat.send_msg(msg1)
-    assert msg1.is_webxdc()
-    assert msg1.filename
-
-    msg2 = ac2._evtracker.wait_next_incoming_message()
-    assert msg2.is_webxdc()
-
-    lp.sec("ac2 sets download limit")
-    ac2.set_config("download_limit", "100")
-    assert msg1.send_status_update({"payload": base64.b64encode(os.urandom(300000))}, "some test data")
-    ac2_update = ac2._evtracker.wait_next_incoming_message()
-    assert ac2_update.download_state == dc.const.DC_DOWNLOAD_AVAILABLE
-    assert not msg2.get_status_updates()
-
-    ac2_update.download_full()
-    ac2._evtracker.get_matching("DC_EVENT_WEBXDC_STATUS_UPDATE")
-    assert msg2.get_status_updates()
-
-    # Get a event notifying that the message disappeared from the chat.
-    msgs_changed_event = ac2._evtracker.get_matching("DC_EVENT_MSGS_CHANGED")
-    assert msgs_changed_event.data1 == msg2.chat.id
-    assert msgs_changed_event.data2 == 0
-
-
 def test_enable_mvbox_move(acfactory, lp):
     (ac1,) = acfactory.get_online_accounts(1)
 

src/calls/calls_tests.rs

@@ -2,7 +2,7 @@ use super::*;
 use crate::chat::forward_msgs;
 use crate::config::Config;
 use crate::constants::DC_CHAT_ID_TRASH;
-use crate::receive_imf::{receive_imf, receive_imf_from_inbox};
+use crate::receive_imf::receive_imf;
 use crate::test_utils::{TestContext, TestContextManager};
 
 struct CallSetup {
@@ -610,65 +610,3 @@ async fn test_end_text_call() -> Result<()> {
 
     Ok(())
 }
-
-/// Tests that partially downloaded "call ended"
-/// messages are not processed.
-#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
-async fn test_no_partial_calls() -> Result<()> {
-    let mut tcm = TestContextManager::new();
-    let alice = &tcm.alice().await;
-
-    let seen = false;
-
-    // The messages in the test
-    // have no `Date` on purpose,
-    // so they are treated as new.
-    let received_call = receive_imf(
-        alice,
-        b"From: bob@example.net\n\
-        To: alice@example.org\n\
-        Message-ID: <first@example.net>\n\
-        Chat-Version: 1.0\n\
-        Chat-Content: call\n\
-        Chat-Webrtc-Room: YWFhYWFhYWFhCg==\n\
-        \n\
-        Hello, this is a call\n",
-        seen,
-    )
-    .await?
-    .unwrap();
-    assert_eq!(received_call.msg_ids.len(), 1);
-    let call_msg = Message::load_from_db(alice, received_call.msg_ids[0])
-        .await
-        .unwrap();
-    assert_eq!(call_msg.viewtype, Viewtype::Call);
-    assert_eq!(call_state(alice, call_msg.id).await?, CallState::Alerting);
-
-    let imf_raw = b"From: bob@example.net\n\
-        To: alice@example.org\n\
-        Message-ID: <second@example.net>\n\
-        In-Reply-To: <first@example.net>\n\
-        Chat-Version: 1.0\n\
-        Chat-Content: call-ended\n\
-        \n\
-        Call ended\n";
-    receive_imf_from_inbox(
-        alice,
-        "second@example.net",
-        imf_raw,
-        seen,
-        Some(imf_raw.len().try_into().unwrap()),
-    )
-    .await?;
-
-    // The call is still not ended.
-    assert_eq!(call_state(alice, call_msg.id).await?, CallState::Alerting);
-
-    // Fully downloading the message ends the call.
-    receive_imf_from_inbox(alice, "second@example.net", imf_raw, seen, None)
-        .await
-        .context("Failed to fully download end call message")?;
-    assert_eq!(call_state(alice, call_msg.id).await?, CallState::Missed);
-
-    Ok(())
-}

src/chat/chat_tests.rs

@@ -3116,7 +3116,7 @@ async fn test_broadcast_channel_protected_listid() -> Result<()> {
         .await?
         .grpid;
 
-    let parsed = mimeparser::MimeMessage::from_bytes(bob, sent.payload.as_bytes(), None).await?;
+    let parsed = mimeparser::MimeMessage::from_bytes(bob, sent.payload.as_bytes()).await?;
     assert_eq!(
         parsed.get_mailinglist_header().unwrap(),
         format!("My Channel <{}>", alice_list_id)
@@ -3311,7 +3311,7 @@ async fn test_leave_broadcast_multidevice() -> Result<()> {
     remove_contact_from_chat(bob0, bob_chat_id, ContactId::SELF).await?;
 
     let leave_msg = bob0.pop_sent_msg().await;
-    let parsed = MimeMessage::from_bytes(bob1, leave_msg.payload().as_bytes(), None).await?;
+    let parsed = MimeMessage::from_bytes(bob1, leave_msg.payload().as_bytes()).await?;
     assert_eq!(parsed.parts[0].msg, "I left the group.");
 
     let rcvd = bob1.recv_msg(&leave_msg).await;

src/config.rs

@@ -438,14 +438,14 @@ pub enum Config {
     /// using this still run unmodified code.
     TestHooks,
 
-    /// Return an error from `receive_imf_inner()` for a fully downloaded message. For tests.
-    FailOnReceivingFullMsg,
-
     /// Enable composing emails with Header Protection as defined in
     /// <https://www.rfc-editor.org/rfc/rfc9788.html> "Header Protection for Cryptographically
     /// Protected Email".
     #[strum(props(default = "1"))]
     StdHeaderProtectionComposing,
+
+    /// Return an error from `receive_imf_inner()`. For tests.
+    SimulateReceiveImfError,
 }
 
 impl Config {

src/context/context_tests.rs

@@ -297,6 +297,7 @@ async fn test_get_info_completeness() {
         "encrypted_device_token",
         "stats_last_update",
         "stats_last_old_contact_id",
+        "simulate_receive_imf_error",
     ];
     let t = TestContext::new().await;
     let info = t.get_info().await.unwrap();