multipart/form-data request pass BLOB files - oracle-apex

Question

I want to pass BLOB files to JIRA. How I can do that? I tried:
DECLARE
l_start TIMESTAMP;
l_duration NUMERIC;
l_result VARCHAR2(32767);
p_array APEX_APPLICATION_GLOBAL.VC_ARR2;
v_login VARCHAR2(100);
v_password VARCHAR2(100);
f_body_blob BLOB;
f_response CLOB;
f_body_clob CLOB;
BEGIN
v_login := 'user';
v_password := 'psw';
SELECT PHOTO INTO f_body_blob FROM LEAN5S_PHOTO WHERE ID = 189;
apex_web_service.g_request_headers.delete;
apex_web_service.g_request_headers(1).name := 'Content-Type';
apex_web_service.g_request_headers(1).value := 'multipart/form-data';
apex_web_service.g_request_headers(2).name := 'X-Atlassian-Token';
apex_web_service.g_request_headers(2).value := 'no-check';
apex_web_service.g_request_headers(3).name := 'file';
apex_web_service.g_request_headers(3).value := 'hand-sanitizer.png';
l_start := systimestamp;
f_response := apex_web_service.make_rest_request(p_url => 'http://site/rest/api/2/issue/key/attachments',
p_http_method => 'POST',
p_body_blob => f_body_blob,
p_username => v_login,
p_password => v_password
);
l_duration := round(extract(second from systimestamp - l_start) * 1000);
dbms_output.put_line(apex_web_service.g_status_code || ' ' || f_response);
END;
But I'm getting request error (500) and file is doesn't uploads:
500 500org.apache.commons.fileupload.FileUploadException:
the request was rejected because no multipart boundary was
foundjava.lang.RuntimeException:
org.apache.commons.fileupload.FileUploadException: the request was
rejected because no multipart boundary was found
My colleague was tried another variant:
DECLARE
p_url VARCHAR2(255) := 'http://site/rest/api/2/issue/key/attachments';
utl_req utl_http.req;
utl_resp utl_http.resp;
req_length BINARY_INTEGER;
response_body VARCHAR2(32767);
p_request_body clob;
l_newline VARCHAR2(50) := chr(13) || chr(10);
lco_boundary CONSTANT VARCHAR2(30) := 'AaB03x';
buffer raw(32767);
amount number(15) := 32767;
offset number(15) := 1;
l_attachment blob;
l_file_name VARCHAR2(255);
l_mime_type VARCHAR2(255);
l_response_header_name varchar2(256);
l_response_header_value varchar2(1024);
l_response_body varchar2(32767);
lang_context integer;
warning varchar2(1000);
blb blob;
tmp_blob blob default EMPTY_BLOB();
dest_offset integer := 1;
src_offset integer := 1;
BEGIN
SELECT PHOTO, FILENAME, MIMETYPE
INTO l_attachment, l_file_name, l_mime_type
FROM LEAN5S_PHOTO
WHERE ID = 156;
p_request_body := l_newline || '--' || lco_boundary || l_newline ||
'Content-Disposition: form-data; name="file"; filename="' ||
l_file_name || '"' || l_newline || 'Content-Type: ' ||
l_mime_type || l_newline ||
'Content-Transfer-Encoding: binary' || l_newline ||
l_newline ||
apex_web_service.blob2clobbase64(l_attachment) ||
l_newline || '--' || lco_boundary || '--';
dbms_lob.createtemporary(blb, FALSE);
dest_offset := 1;
src_offset := 1;
lang_context := 0;
dbms_lob.converttoblob(blb,
p_request_body,
dbms_lob.getlength(p_request_body),
dest_offset,
src_offset,
0,
lang_context,
warning);
dbms_lob.append(blb, l_attachment);
req_length := dbms_lob.getlength(blb);
utl_req := utl_http.begin_request(url => p_url,
method => 'POST',
http_version => 'HTTP/1.1');
utl_http.set_authentication(utl_req, 'user', 'psw', 'Basic');
utl_http.set_header(utl_req, 'X-Atlassian-Token', 'no-check');
utl_http.set_header(utl_req, 'User-Agent', 'Mozilla/4.0');
utl_http.set_header(utl_req,
'Content-Type',
'multipart/form-data; boundary="' || lco_boundary || '"');
dbms_output.put_line(req_length);
IF req_length <= 32767 THEN
utl_http.set_header(utl_req, 'Content-Length', req_length);
utl_http.write_raw(utl_req, blb);
ELSIF req_length > 32767 THEN
utl_http.set_header(utl_req, 'Transfer-Encoding', 'chunked');
WHILE (offset < req_length) LOOP
dbms_lob.read(blb, amount, offset, buffer);
utl_http.write_raw(utl_req, buffer);
offset := offset + amount;
END LOOP;
END IF;
utl_resp := utl_http.get_response(utl_req);
dbms_output.put_line('Response> Status Code: ' || utl_resp.status_code);
for i in 1 .. utl_http.get_header_count(utl_resp) loop
utl_http.get_header(utl_resp, i, l_response_header_name, l_response_header_value);
dbms_output.put_line('Response> ' || l_response_header_name || ': ' || l_response_header_value);
end loop;
utl_http.read_text(utl_resp, l_response_body, 32767);
--utl_http.read_raw(utl_resp, response_body, 32767);
dbms_output.put_line('Response body>');
dbms_output.put_line(l_response_body);
utl_http.end_response(utl_resp);
EXCEPTION
WHEN UTL_HTTP.TOO_MANY_REQUESTS THEN
utl_http.END_RESPONSE(utl_resp);
END;
This variant is working, but file in JIRA is corrupted.
EDIT: Somethink with encoding. I have tried to send .txt file and in JIRA, file content is in Base64 format.