Add C API to get HTTP responses

deltachat-ffi/src/lib.rs

@@ -31,6 +31,7 @@ use deltachat::ephemeral::Timer as EphemeralTimer;
 use deltachat::imex::BackupProvider;
 use deltachat::key::DcKey;
 use deltachat::message::MsgId;
+use deltachat::net::read_url_blob;
 use deltachat::qr_code_generator::{generate_backup_qr, get_securejoin_qr_svg};
 use deltachat::reaction::{get_msg_reactions, send_reaction, Reactions};
 use deltachat::stock_str::StockMessage;
@@ -4467,6 +4468,93 @@ pub unsafe extern "C" fn dc_provider_unref(provider: *mut dc_provider_t) {
     // this may change once we start localizing string.
 }
 
+// dc_http_response_t
+
+pub type dc_http_response_t = net::HttpResponse;
+
+#[no_mangle]
+pub unsafe extern "C" fn dc_get_http_response(
+    context: *const dc_context_t,
+    url: *const libc::c_char,
+) -> *mut dc_http_response_t {
+    if context.is_null() || url.is_null() {
+        eprintln!("ignoring careless call to dc_get_http_response()");
+        return ptr::null_mut();
+    }
+
+    let context = &*context;
+    let url = to_string_lossy(url);
+    if let Ok(response) = block_on(read_url_blob(context, &url)).log_err(context, "read_url_blob") {
+        Box::into_raw(Box::new(response))
+    } else {
+        ptr::null_mut()
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn dc_http_response_get_mimetype(
+    response: *const dc_http_response_t,
+) -> *mut libc::c_char {
+    if response.is_null() {
+        eprintln!("ignoring careless call to dc_http_response_get_mimetype()");
+        return ptr::null_mut();
+    }
+
+    let response = &*response;
+    response.mimetype.strdup()
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn dc_http_response_get_encoding(
+    response: *const dc_http_response_t,
+) -> *mut libc::c_char {
+    if response.is_null() {
+        eprintln!("ignoring careless call to dc_http_response_get_encoding()");
+        return ptr::null_mut();
+    }
+
+    let response = &*response;
+    response.encoding.strdup()
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn dc_http_response_get_blob(
+    response: *const dc_http_response_t,
+) -> *mut libc::c_char {
+    if response.is_null() {
+        eprintln!("ignoring careless call to dc_http_response_get_blob()");
+        return ptr::null_mut();
+    }
+
+    let response = &*response;
+    let blob_len = response.blob.len();
+    let ptr = libc::malloc(blob_len);
+    libc::memcpy(ptr, response.blob.as_ptr() as *mut libc::c_void, blob_len);
+    ptr as *mut libc::c_char
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn dc_http_response_get_size(
+    response: *const dc_http_response_t,
+) -> libc::size_t {
+    if response.is_null() {
+        eprintln!("ignoring careless call to dc_http_response_get_size()");
+        return 0;
+    }
+
+    let response = &*response;
+    response.blob.len()
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn dc_http_response_unref(response: *mut dc_http_response_t) {
+    if response.is_null() {
+        eprintln!("ignoring careless call to dc_http_response_unref()");
+        return;
+    }
+    drop(Box::from_raw(response));
+}
+
 // -- Accounts
 
 /// Reader-writer lock wrapper for accounts manager to guarantee thread safety when using