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47 lines
1.6 KiB
Markdown
47 lines
1.6 KiB
Markdown
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---
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title: "mg_parse_multipart()"
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decl_name: "mg_parse_multipart"
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symbol_kind: "func"
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signature: |
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size_t mg_parse_multipart(const char *buf, size_t buf_len, char *var_name,
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size_t var_name_len, char *file_name,
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size_t file_name_len, const char **chunk,
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size_t *chunk_len);
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---
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Parses the buffer `buf`, `buf_len` that contains multipart form data chunks.
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Stores the chunk name in a `var_name`, `var_name_len` buffer.
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If a chunk is an uploaded file, then `file_name`, `file_name_len` is
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filled with an uploaded file name. `chunk`, `chunk_len`
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points to the chunk data.
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Return: number of bytes to skip to the next chunk or 0 if there are
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no more chunks.
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Usage example:
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```c
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static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
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switch(ev) {
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case MG_EV_HTTP_REQUEST: {
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struct http_message *hm = (struct http_message *) ev_data;
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char var_name[100], file_name[100];
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const char *chunk;
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size_t chunk_len, n1, n2;
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n1 = n2 = 0;
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while ((n2 = mg_parse_multipart(hm->body.p + n1,
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hm->body.len - n1,
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var_name, sizeof(var_name),
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file_name, sizeof(file_name),
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&chunk, &chunk_len)) > 0) {
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printf("var: %s, file_name: %s, size: %d, chunk: [%.*s]\n",
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var_name, file_name, (int) chunk_len,
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(int) chunk_len, chunk);
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n1 += n2;
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}
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}
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break;
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```
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