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Simple HTTP client with HTTP/1.1, HTTP/2, and HTTP/3 support

Security advisory: This version has known vulnerabilities. View advisories
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hackney c_src lsquic src liblsquic lsquic_http.c
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c_src/lsquic/src/liblsquic/lsquic_http.c 

/* Copyright (c) 2017 - 2022 LiteSpeed Technologies Inc.  See LICENSE. */

/* Various HTTP-related functions. */



#include <stddef.h>

#include <stdlib.h>

#ifdef WIN32

#include <vc_compat.h>

#endif



#include "ls-sfparser.h"

#include "lsquic.h"

#include "lsquic_hq.h"





struct parse_pfv_ctx

{

    enum ppc_flags                  ppc_flags;

    struct lsquic_ext_http_prio    *ppc_ehp;

};





static int

parse_pfv (void *user_data, enum ls_sf_dt type, char *str, size_t len, int off)

{

    struct parse_pfv_ctx *const pfv_ctx = user_data;

    unsigned urgency;



    if (type == LS_SF_DT_NAME)

    {

        if (1 == len)

            switch (str[0])

            {

                case 'u': pfv_ctx->ppc_flags |= PPC_URG_NAME; return 0;

                case 'i': pfv_ctx->ppc_flags |= PPC_INC_NAME; return 0;

            }

    }

    else if (pfv_ctx->ppc_flags & PPC_URG_NAME)

    {

        if (type == LS_SF_DT_INTEGER)

        {

            urgency = atoi(str);

            if (urgency <= LSQUIC_MAX_HTTP_URGENCY)

            {

                pfv_ctx->ppc_ehp->urgency = urgency;

                pfv_ctx->ppc_flags |= PPC_URG_SET;

            }

        }

    }

    else if (pfv_ctx->ppc_flags & PPC_INC_NAME)

    {

        if (type == LS_SF_DT_BOOLEAN)

        {

            pfv_ctx->ppc_ehp->incremental = str[0] - '0';

            pfv_ctx->ppc_flags |= PPC_INC_SET;

        }

    }

    pfv_ctx->ppc_flags &= ~(PPC_INC_NAME|PPC_URG_NAME);



    return 0;

}





int

lsquic_http_parse_pfv (const char *pfv, size_t pfv_sz,

        enum ppc_flags *flags, struct lsquic_ext_http_prio *ehp,

        char *scratch_buf, size_t scratch_sz)

{

    int ret;

    struct parse_pfv_ctx pfv_ctx = { .ppc_flags = flags ? *flags : 0,

                                     .ppc_ehp   = ehp, };



    ret = ls_sf_parse(LS_SF_TLT_DICTIONARY, pfv, pfv_sz, parse_pfv, &pfv_ctx,

                                                    scratch_buf, scratch_sz);

    if (flags)

        *flags = pfv_ctx.ppc_flags;

    return ret;

}